开发者资源 · Free for Developers

开发者资源

收集开发者与开源作者可用的免费服务/层级。

Major Cloud Providers

Google Cloud Platform 谷歌云平台，提供计算、存储、数据库、AI 等全套云服务，含免费额度

Google Colab Free Jupyter Notebooks development environment. 免费的 Jupyter Notebooks 开发环境。

Kaggle Jupyter Notebooks with 4 CPU cores and 30 GB RAM computational environment without any weekly usage limits. With Phone number verification, 1 Nvidia Tesla P100 GPU or 2x Nvidia Tesla T4 GPU can be added with a usage limit of 30 GPU hours/week for free. With Identity verification - 1 TPU v3-8 with 96 CPU cores and 330 GB RAM is available with a usage limit of 20 hours/week for free. Check Technical Specifications for more details. 带有 4 个 CPU 核心和 30 GB RAM 计算环境的 Jupyter Notebooks，无任何每周使用限制。通过电话号码验证，可以免费添加 1 个 Nvidia Tesla P100 GPU 或 2 个 Nvidia Tesla T4 GPU，每周使用限制为 30 个 GPU 小时。通过身份验证 - 提供 1 个 TPU v3-8，具有 96 个 CPU 核心和 330 GB RAM，每周免费使用限制为 20 小时。查看技术规格以获取更多详细信息。

ChromeRemoteDesktop Free remote desktop app with practically no limit on the number of devices, owned by Google, so needs a Google account. 一款免费的远程桌面应用程序，没有设备数量的限制，由 Google 拥有，因此需要 Google 账户。

Google AI Studio Get free access to Gemini 3.5 Flash, Gemini 3 Flash and Gemma 4 models. The free tier for Flash offers 5 requests per minute, 20 requests per day, and 250k input tokens per minute. Meanwhile the free tier for Gemma 4 offers 30 requests per minute, 14.4k requests per day, but (only) 16k input tokens per minute. 免费访问 Gemini 3.5 Flash、Gemini 3 Flash 和 Gemma 4 模型。Flash 的免费层提供每分钟 5 个请求、每天 20 个请求和每分钟 250k 输入令牌。同时，Gemma 4 的免费层提供每分钟 30 个请求、每天 14.4k 请求，但（仅）每分钟 16k 输入令牌。

Amazon Web Services 亚马逊云服务，提供弹性计算、存储、数据库等数百项云产品，含免费套餐

CloudFront 1TB egress/month, 10M HTTP requests, and 2M Function invocations/month 每月 1TB 出口流量、10M 个 HTTP 请求和 2M 个函数调用。

CloudWatch 10 custom metrics and alarms, 1M API requests, 5GB of log data ingestion and 5GB of log data archive 10 个自定义指标和警报、1M 个 API 请求、5GB 的日志数据摄入和 5GB 的日志数据存档。

CodeBuild 100min of build time/month 每月 100 分钟的构建时间。

CodeCommit 5 active users, 5k repositories/account, 50GB storage/month and 10K requests/month 5 个活跃用户、5k 个存储库/账户、每月 50GB 存储空间和每月 10K 个请求。

CodePipeline 1 active pipeline/month 每月1个活动管道

DynamoDB 25GB NoSQL DB 25GB NoSQL数据库

Lambda 1 million requests/month 每月100万次请求

SNS 1 million publishes/month 每月100万次发布

SES 3.000 messages/month (6mo) 每月3,000条消息（6个月）

SQS 1 million messaging queue requests 每月100万次消息队列请求

Microsoft Azure 微软云，提供虚拟机、数据库、AI、DevOps 等云服务，含免费额度

App Service 10 web, mobile, or API apps (60 CPU minutes/day) 每天60个CPU分钟，可创建10个Web、移动或API应用

Functions 1 million requests per month 每月100万次请求

DevTest Labs Enable fast, easy, and lean dev-test environments 快速、简单、精简的dev-test环境启用器

Active Directory 500,000 objects 500,000个对象

Active Directory B2C 50,000 monthly stored users 每月存储50,000个用户

Azure DevOps 5 active users, unlimited private Git repos 5个活跃用户，无限量私有Git仓库

Azure Pipelines 10 free parallel jobs with unlimited minutes for open source for Linux, macOS, and Windows 10个免费并行作业，Linux、macOS和Windows的开源项目无限量分钟

Microsoft IoT Hub 8,000 messages per day 每天8,000条消息

Load Balancer 负载均衡器 750 hours, 15GB data processing and 5 rules (12mo) 750小时，15GB数据处理和5条规则（12个月）

Notification Hubs 通知中心 1 million push notifications 1,000万条推送通知

Bandwidth 带宽 15GB Outbound(12mo) 15GB出站（12个月）

Cosmos DB 25GB storage and 1000 RUs of provisioned throughput 25GB存储和1000 RUs的预留吞吐量

Static Web Apps 静态Web应用 Build, deploy, and host static apps and serverless functions with free SSL, Authentication/Authorization, and custom domains 使用免费SSL、身份验证/授权和自定义域名构建、部署和托管静态应用和无服务器函数

Storage 存储 100GB LRS transactions (Azure Files), 5GB Blob storage, 10GB LRS Archive Storage, 2x64GB SSD (12mo) 100GB LRS 事务（Azure 文件），5GB Blob 存储，10GB LRS 存档存储，2x64GB SSD（12个月）

Cognitive Services 认知服务 AI/ML APIs (Computer Vision, Translator, Face detection, Bots, etc) with free tier including limited transactions AI/ML API（计算机视觉、翻译器、人脸检测、机器人等），包括免费层和有限的事务

Cognitive Search 认知搜索 AI-based search and indexation service, free for 10,000 documents 基于 AI 的搜索和索引服务，前 10,000 份文档免费

Azure Kubernetes Service Azure Kubernetes 服务 Managed Kubernetes service, free cluster management 托管 Kubernetes 服务，免费集群管理

Event Grid 事件网格 100K ops/month 每月 100K 操作

Service Bus 服务总线 750 hours and 13 million operations Standard tier base unit (12mo) 标准层基础单位（12个月）：750 小时和 1300 万次操作

Oracle Cloud Oracle 云 甲骨文云，提供计算、存储、自治数据库等，含永久免费套餐

IBM Cloud IBM 云 IBM 云，提供云服务器、Kubernetes、AI 与 Watson 等服务

Cloudflare 提供 CDN、DNS、DDoS 防护、Workers 边缘计算等，免费套餐功能丰富

Application Services 应用服务 Free DNS for an unlimited number of domains, DDoS Protection, CDN along with free SSL, Firewall rules and page rules, WAF, Bot Mitigation, Free Unmetered Rate Limiting - 1 rule per domain, Analytics, Email forwarding 无限数量的域名免费 DNS，DDoS 保护，CDN 以及免费 SSL，防火墙规则和页面规则，WAF，机器人缓解，免费无计量速率限制 - 每个域名 1 条规则，分析，邮件转发

Zero Trust & SASE 零信任 & SASE Up to 50 Users, 24 hours of activity logging, three network locations 最多50个用户，24小时活动记录，三个网络位置

Cloudflare Tunnel Cloudflare隧道 You can expose locally running HTTP port over a tunnel to a random subdomain on trycloudflare.com use Quick Tunnels, No account required. More features (TCP tunnel, Load balancing, VPN) in Zero Trust Free Plan. 您可以将本地运行的HTTP端口通过隧道暴露到trycloudflare.com的随机子域上，使用快速隧道，无需账户。Zero Trust免费计划中包含更多功能（TCP隧道、负载均衡、VPN）

Workers Deploy serverless code for free on Cloudflare's global network-100k daily requests. 在Cloudflare的全网范围内免费部署无服务器代码-每日100k请求

Workers KV 100k read requests per day, 1000 write requests per day, 1000 delete requests per day, 1000 list requests per day, 1 GB stored data 每日100k次读取请求，每日1000次写入请求，每日1000次删除请求，每日1000次列表请求，1 GB存储数据

R2 10 GB per month, 1 million Class A operations per month, 10 million Class B operations per month 每月10 GB，每月100万次A类操作，每月1000万次B类操作

D1 5 million rows read per day, 100k rows written per day, 1 GB storage 每日读取500万行，每日写入10万行，1 GB存储

Pages Develop and deploy your web apps on Cloudflare's fast, secure global network. Five hundred monthly builds, 100 custom domains, Integrated SSL, unlimited accessible seats, unlimited preview deployments, and full-stack capability via Cloudflare Workers integration. 在Cloudflare的快速、安全的全网网络上开发和部署您的Web应用。每月500次构建，100个自定义域名，集成SSL，无限可访问座位，无限预部署，以及通过Cloudflare Workers集成提供全栈功能

Queues 1 million operations per month 每月1000万次操作

TURN 1TB of free (outgoing) traffic per month. 每月1TB的免费（出站）流量

Zoho Started as an e-mail provider but now provides a suite of services, some of which have free plans. List of services having free plans : 最初是一家电子邮件提供商，但现在提供一系列服务，其中一些服务提供免费计划。具有免费计划的服务列表：

Catalyst by Zoho Zoho Catalyst PaaS/full-stack cloud platform with a generous free tier 具有慷慨免费层的PaaS/全栈云平台

Zoho Apptics Unified and actionable product analytics to monitor performance, analyze user behavior and collect feedback for mobile, web, and desktop apps with generous Free Forever plan. 统一且可操作的产品分析，用于监控性能、分析用户行为并收集移动、Web和桌面应用的反馈，拥有慷慨的永久免费计划。

Zoho Assist Zoho Assist's forever free plan includes one concurrent remote support license and Access to 5 unattended computer licenses for unlimited duration available for both professional and personnel use. Zoho Assist的永久免费计划包括一个并发远程支持许可证和5个未出席计算机许可证的访问权限，可用于专业和个人使用，无限制期。

Docs Free for 5 users with 1 GB upload limit & 5GB storage. Zoho Office Suite (Writer, Sheets & Show) comes bundled. 免费提供给5个用户，上传限制为1GB，存储空间为5GB。Zoho Office Suite（Writer、Sheets & Show）捆绑提供。

Projects Free for 3 users, 2 projects & 10 MB attachment limit. The same plan applies to Bugtracker. 免费提供给3个用户，2个项目和10MB附件限制。相同的计划适用于Bugtracker。

Connect Team Collaboration free for 25 users with three groups, three custom apps, 3 Boards, 3 Manuals, and 10 Integrations along with channels, events & forums. 团队协作免费提供给25个用户，包括三个组、三个自定义应用、3个看板、3个手册和10个集成，以及频道、事件和论坛。

Meeting Meetings with upto 3 meeting participants & 10 Webinar attendees. 最多支持3个会议参与者和10个网络研讨会参与者。

Vault Password Management is accessible for Individuals. 密码管理对个人用户可用。

Showtime Yet another Meeting software for training for a remote session of up to 5 attendees. 用于远程会议最多5个参与者的另一款会议软件。

Notebook A free alternative to Evernote. Evernote的免费替代品。

Wiki Free for three users with 50 MB storage, unlimited pages, zip backups, RSS & Atom feed, access controls & customizable CSS. 免费提供给3个用户，50MB存储空间，无限页面，zip备份，RSS & Atom订阅源，访问控制和可定制的CSS。

Subscriptions 订阅 Recurring Billing management free for 20 customers/subscriptions & 1 user with all the payment hosting done by Zoho. The last 40 subscription metrics are stored 前20个客户/订阅和1个用户可免费使用周期性账单管理，所有支付托管由Zoho完成。存储最后40个订阅指标。

Checkout 结账 Product Billing management with 3 pages & up to 50 payments. 产品账单管理，包含3个页面和最多50个支付。

Desk Customer Support management with three agents, private knowledge base, and email tickets. Integrates with Assist for one remote technician & 5 unattended computers. 客户支持管理，包含3个代理，私有知识库和电子邮件工单。与Assist集成，支持1个远程技术人员和5台无人值守计算机。

Cliq Team chat software with 100 GB storage, unlimited users, 100 users per channel & SSO. 团队聊天软件，100GB存储空间，无限用户，每个频道100个用户，单点登录。

Campaigns Email Marketing 电子邮件营销

Forms Form Creator 表单创建器

Sign Paperless Signatures 无纸化签名

Surveys Online Surveys 在线调查

Bookings Appointment Scheduling 预约安排

Cloud management solutions

Brainboard Collaborative solution to visually build and manage cloud infrastructures from end-to-end. 从端到端可视化构建和管理云基础设施的协作解决方案。

Cloud 66 Free for personal projects (includes one deployment server, one static site), Cloud 66 gives you everything you need to build, deploy, and grow your applications on any cloud without the headache of the “server stuff.”. 适用于个人项目免费（包括一个部署服务器和一个静态网站），Cloud 66 为您提供构建、部署和扩展应用程序所需的一切，无需处理“服务器问题”。

Cloud Cost Analyzer 云成本分析器 Scan AWS and Azure for cost waste with 92 automated checks including idle NAT gateways, gp2 volumes, and over-provisioned instances. Get savings estimates in a read-only, developer-first CLI. Free tier covers up to 5,000 resources per scan on one AWS account. Paid tiers add resource IDs and exact remediation steps. 使用92项自动化检查扫描AWS和Azure中的成本浪费，包括闲置NAT网关、gp2卷和过度配置的实例。在只读的开发者优先CLI中获得节省估算。免费层覆盖一个AWS账户扫描中最多5,000个资源。付费层添加资源ID和精确的修复步骤。

deployment.io Deployment.io helps developers automate deployments on AWS. On our free tier, a developer (single user) can deploy unlimited static sites, web services, and environments. We provide 10 job executions free per month with previews and auto-deploys included in the free tier. Deployment.io 帮助开发者自动化 AWS 上的部署。在我们的免费层中，开发者（单个用户）可以部署无限数量的静态网站、网络服务和环境。我们每月提供 10 次作业执行免费，免费层包括预览和自动部署。

Parsivex Parsivex scans your AWS account for idle EC2, unattached EBS, oversized RDS, stale snapshots, NAT gateway overuse etc. Free tier provides a monthly scan for one AWS account and returns total monthly waste plus a category breakdown. Paid plans give access to itemized findings and scheduled re-scans. Parsivex扫描您的AWS账户中的闲置EC2、未附加的EBS、过大的RDS、过时的快照、NAT网关过度使用等问题。免费层为单个AWS账户提供每月一次的扫描，并返回每月浪费的总数以及类别细分。付费计划提供详细发现和计划重新扫描的访问权限。

Pulumi Modern infrastructure as a code platform that allows you to use familiar programming languages and tools to build, deploy, and manage cloud infrastructure. 现代基础设施即代码平台，允许您使用熟悉的编程语言和工具构建、部署和管理云基础设施。

scalr.com Scalr is a Terraform Automation and COllaboration (TACO) product used to better collaboration and automation on infrastructure and configurations managed by Terraform. Full Terraform CLI support, OPA integration, and a hierarchical configuration model. No SSO tax. All features are included. Use up to 50 runs/month for free. Scalr 是一款 Terraform 自动化和协作（TACO）产品，用于更好地协作和自动化 Terraform 管理的基础设施和配置。提供完整的 Terraform CLI 支持、OPA 集成和分层配置模型。无 SSO 税。所有功能均包含在内。免费使用最多 50 次运行/月。

Source Code Repos

Bitbucket Unlimited public and private Git repos for up to 5 users with Pipelines for CI/CD 最多 5 个用户的无限公共和私有 Git 仓库，包括 CI/CD 的 Pipeline。

Codeberg Unlimited public and private Git repos for free and open-source projects (with unlimited collaborators). Powered by Forgejo. Static website hosting with Codeberg Pages. CI/CD hosting with Codeberg's CI. Translating hosting with Codeberg Translate. Includes Package and Container hosting, Project management, and Issue Tracking 免费和开源项目的无限公共和私有 Git 仓库（具有无限协作者）。由 Forgejo 驱动。静态网站托管通过 Codeberg Pages。CI/CD 托管通过 Codeberg 的 CI。翻译托管通过 Codeberg Translate。包括软件包和容器托管、项目管理以及问题跟踪。

framagit.org Framagit is the software forge of Framasoft based on the Gitlab software includes CI, Static Pages, Project pages and Issue tracking. Framagit 是基于 Gitlab 软件的 Framasoft 软件库，包括 CI、静态页面、项目页面和问题跟踪。

GitGud Unlimited private and public repositories. Free forever. Powered by GitLab & Sapphire. Includes CI/CD, Static Hosting, Container Registry, Project Management and Issue Tracking. 无限私有和公共仓库。永久免费。由 GitLab 和 Sapphire 驱动。包括 CI/CD、静态托管、容器注册库、项目管理以及问题跟踪。

GitHub Unlimited public repositories and unlimited private repositories (with unlimited collaborators). Includes CI/CD, Development Environment, Static Hosting, Package and Container hosting, Project management and AI Copilot 无限公共仓库和无限私有仓库（具有无限协作者）。包括 CI/CD、开发环境、静态托管、软件包和容器托管、项目管理以及 AI Copilot。

gitlab.com Unlimited public and private Git repos with up to 5 collaborators. Includes CI/CD, Static Hosting, Container Registry, Project Management and Issue Tracking 无限公共和私有Git仓库，最多支持5个协作者。包括CI/CD、静态托管、容器注册、项目管理以及问题跟踪

heptapod.net Heptapod is a friendly fork of GitLab Community Edition providing support for Mercurial Heptapod是GitLab社区版的友好分支，提供对Mercurial的支持

pijul.com Unlimited free and open source distributed version control system. Its distinctive feature is based on a sound theory of patches, which makes it easy to learn, use, and distribute. Solves many problems of git/hg/svn/darcs. 无限免费开源分布式版本控制系统。其独特之处在于基于一个稳健的补丁理论，这使得它易于学习、使用和分发。解决了git/hg/svn/darcs的许多问题

projectlocker.com One free private project (Git and Subversion) with 50 MB of space 一个免费的私有项目（Git和Subversion），空间为50MB

RocketGit Repository Hosting based on Git. Unlimited Public and private repositories. 基于Git的仓库托管。无限公共和私有仓库

savannah.gnu.org Serves as a collaborative software development management system for free Software projects (for GNU Projects) 为免费软件项目（GNU项目）提供协作软件开发管理系统

savannah.nongnu.org Serves as a collaborative software development management system for free Software projects (for non-GNU projects) 为免费软件项目（非GNU项目）提供协作软件开发管理系统

APIs, Data, and ML

Abstract API API suite for various use cases, including IP geolocation, phone number validation, or email validation. 适用于各种用例的API套件，包括IP地理位置、电话号码验证或电子邮件验证

AlphaAI Financial news API and MCP server. Every article gets per-ticker impact analysis, a category, and a 1-10 relevance score, and SEC Form 4 insider filings are turned into scored events. The free tier includes 20 requests per minute and 100 requests per day on both REST and MCP, no card required. 金融新闻API和MCP服务器。每篇文章都进行逐股票影响分析、分类和1-10的相关性评分，SEC表格4内部人士提交的文件被转换为评分事件。免费层包括每分钟20次请求和每天100次请求，REST和MCP均无需信用卡

AnyHook Inbound webhook relay: point a Stripe, GitHub or LINE bot webhook at it and it stores each event before delivering to your handler, retries automatically when your endpoint is down, and keeps a log you can replay from. Endpoints can be created from the API with no account. Free plan includes 3,000 events/month, 1 app, 3 retries and 3 days of retention, no credit card. 入站webhook中继：将Stripe、GitHub或LINE机器人webhook指向它，并存储每个事件然后再交付给您的处理器，当您的端点不可用时自动重试，并保留一个您可以回放的日志。可以通过API创建端点，无需账户。免费计划包括每月3,000个事件、1个应用程序、3次重试和3天的保留时间，无需信用卡

Apify Web scraping and automation platform to create an API for any website and extract data. Ready-made scrapers, integrated proxies, and custom solutions. Free plan with $5 platform credits included every month. 网页抓取和自动化平台，用于为任何网站创建API并提取数据。提供现成的抓取器、集成代理和定制解决方案。每月包含5美元的平台信用额的免费计划。

APITemplate.io Auto-generate images and PDF documents with a simple API or automation tools like Zapier & Airtable. No CSS/HTML is required. The free plan comes with 50 images/month and three templates. 使用简单的API或自动化工具（如Zapier和Airtable）自动生成图像和PDF文档。无需CSS/HTML。免费计划每月包含50张图片和三个模板。

APIVerve Get instant access to over 120+ APIs for free, built with quality, consistency, and reliability in mind. The free plan covers up to 50 API Tokens per month. (Possibly taken down, 2025-06-25) 免费获取超过120+个API的即时访问权限，这些API以质量、一致性和可靠性为设计理念。免费计划每月涵盖多达50个API令牌。（可能已下架，2025-06-25）

Beeceptor No-code, cloud-based platform for mocking and debugging multi-protocol APIs (REST, SOAP, gRPC & GraphQL), providing instant servers with rules-based logic, CRUD & stateful mocking, proxying, and CORS management for faster integration and testing. The free plan includes 50 requests per day and provides a public dashboard/endpoint where anyone with the dashboard URL can view submitted requests and responses. 无代码、基于云的平台，用于模拟和调试多协议API（REST、SOAP、gRPC & GraphQL），提供基于规则的逻辑、CRUD和有状态模拟、代理和CORS管理，以实现更快的集成和测试。免费计划每天包含50次请求，并提供一个公共仪表板/端点，任何人都可以通过仪表板URL查看提交的请求和响应。

BigDataCloud Provides fast, accurate, and free (Unlimited or up to 10K-50K/month) APIs for modern web like IP Geolocation, Reverse Geocoding, Networking Insights, Email and Phone Validation, Client Info and more. 提供快速、准确且免费的（无限量或每月最多10K-50K）API，适用于现代网络，如IP地理位置、反向地理编码、网络洞察、电子邮件和电话验证、客户端信息等。

Brave Search API Independent web, news, image, video search and AI/LLM context API, suitable for RAG pipelines and AI agents. Free tier includes $5 in monthly credits (credit card required for verification). 独立的网络、新闻、图像、视频搜索和AI/LLM上下文API，适用于RAG管道和AI代理。免费层包含每月5美元的信用额（验证需要信用卡）。

Browse AI Extracting and monitoring data on the web. 1k credits per month for free, equals 1k concurrent requests. 从网络上提取和监控数据。每月免费提供1k信用额，相当于1k并发请求。

Calendarific Enterprise-grade Public holiday API service for over 200 countries. The free plan includes 500 calls per month. 适用于200多个国家的企业级公共假日API服务。免费计划每月包含500次调用。

Canopy GraphQL API for Amazon.com product, search, and category data. The free plan includes 100 calls per month. Amazon.com产品、搜索和分类数据的GraphQL API。免费计划每月包含100次调用。

CarAPI.dev Comprehensive automotive data API with VIN decoding, stolen vehicle checks, vehicle valuation, inspection data, and more. Free tier includes 100 requests/month across all 9 endpoints. 全面的汽车数据API，包括VIN解码、被盗车辆检查、车辆估值、检查数据等。免费层包括所有9个端点每月100次请求。

CatchDoms Aggregator of expired and dropping domain listings from 16 marketplaces, with SEO enrichment (backlinks, Trust Flow, Wayback history) and a quality score. Free plan: 10 unlocked listings, 5 favorites, 3 saved searches. 7-day Pro trial on signup includes full REST API and MCP server access. 从16个市场聚合过期和即将下架的域名列表，包括SEO丰富（反向链接、Trust Flow、Wayback历史）和质量评分。免费计划包括10个解锁列表、5个收藏夹、3个保存的搜索。注册时7天Pro试用包括完整的REST API和MCP服务器访问。

Cloudmersive Utility API platform with full access to expansive API Library including Document Conversion, Virus Scanning, and more with 600 calls/month, North America AZ only, 2.5MB maximum file size. 实用API平台，提供全面的API库访问权限，包括文档转换、病毒扫描等，每月600次调用，仅限北美AZ地区，最大文件大小为2.5MB。

CometML The MLOps platform for experiment tracking, model production management, model registry, and complete data lineage, covering your workflow from training to production. Free for individuals and academics. MLOps平台，用于实验跟踪、模型生产管理、模型注册和完整的数据血缘，覆盖从训练到生产的整个工作流程。个人和学者免费。

Commerce Layer Composable commerce API that can build, place, and manage orders from any front end. The developer plan allows 100 orders per month and up to 1,000 SKUs for free. 可组合的API，可以构建、放置和管理来自任何前端订单。开发者计划每月允许100个订单，免费提供最多1,000个SKU。

Composio Integration platform for AI Agents and LLMs. Integrate over 200+ tools across the agentic internet. AI代理和LLMs的集成平台。集成超过200+工具，覆盖代理互联网。

Conversion Tools Online File Converter for documents, images, video, audio, and eBooks. REST API is available. Libraries for Node.js, PHP, Python. Support files up to 50 GB (for paid plans). The free tier is limited by file size (20MB) and number of conversions (30/Day, 300/Month). 在线文件转换器，支持文档、图像、视频、音频和电子书。提供REST API。支持Node.js、PHP、Python库。支持文件大小高达50GB（付费计划）。免费层受文件大小（20MB）和转换次数（每天30次，每月300次）限制。

Country-State-City Microservice API API and Microservice to provides a wide range of information including countries, regions, provinces, cities, postal codes, and much more. The free tier includes up to 100 requests per day. API和微服务，提供包括国家、地区、省份、城市、邮政编码等在内的广泛信息。免费层包括每天最多100次请求。

Coupler Data integration tool that syncs between apps. It can create live dashboards and reports, transform and manipulate values, and collect and back up insights. The free plan is limited to one user, data connection, data source, and data destination. Also requires manual data refresh. 数据集成工具，在应用程序之间同步。它可以创建实时仪表板和报告，转换和操作值，并收集和备份洞察。免费计划限制为一个用户、数据连接、数据源和数据目的地。还需要手动刷新数据。

CraftMyPDF Auto-Generate PDF documents from reusable templates with a drop-and-drop editor and a simple API. The free plan comes with 100 PDFs/month and three templates. 使用拖放编辑器和简单的API从可重复使用的模板自动生成PDF文档。免费计划每月包含100个PDF和三个模板。

Cube Cube helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application. The fastest way to use Cube is with Cube Cloud, which has a free tier limited to 1,000 queries per day. Cube帮助数据工程师和应用开发者访问现代数据存储，将其组织成一致的定义，并将其交付给每个应用。使用Cube Cloud是使用Cube的最快方式，它有一个免费层，每天限制为1,000次查询。

CurlHub Proxy service for inspecting and debugging API calls. The free plan includes 10,000 requests per month. 用于检查和调试API调用的代理服务。免费计划每月包含10,000次请求。

CurrencyScoop Realtime currency data API for fintech apps. The free plan includes 5,000 calls per month. 为金融科技应用提供实时货币数据API。免费计划每月包含5,000次调用。

CustomJS HTML to PDF or PDF to PNG/Text & PDF merging/extraction/merging APIs. Free tier has 600 calls a month. HTML到PDF或PDF到PNG/Text & PDF合并/提取/合并API。免费层每月有600次调用。

Data Fetcher Connect Airtable to any application or API with no code. Postman-like interface for running API requests in Airtable. Pre-built integrations with dozens of apps. The free plan includes 100 runs per month. 无需代码即可将Airtable连接到任何应用或API。Postman-like界面在Airtable中运行API请求。与数十个应用预建集成。免费计划每月包含100次运行。

Dataimporter.io Tool for connecting, cleaning, and importing data into Salesforce. Free Plan includes up to 20,000 records per month. 连接、清理并将数据导入Salesforce的工具。免费计划每月包含多达20,000条记录。

Datalore Python notebooks by Jetbrains. Includes 10 GB of storage and 120 hours of runtime each month. Jetbrains的Python笔记本。每月包含10 GB的存储空间和120小时的运行时间。

DB Designer Cloud-based Database schema design and modeling tool with a free starter plan of 2 Database models and ten tables per model. 基于云的数据库模式设计和建模工具，免费入门计划包含2个数据库模型和每个模型10张表。

DB-IP Free IP geolocation API with 1k request per IP per day.lite database under the CC-BY 4.0 License is free too. 每天每个IP有1k次请求的免费IP地理位置API。轻量级数据库在CC-BY 4.0许可下也是免费的。

DeepAR Augmented reality face filters for any platform with one SDK. The free plan provides up to 10 monthly active users (MAU) and tracks up to 4 faces 适用于任何平台的增强现实面部滤镜，一个SDK即可。免费计划提供最多10个每月活跃用户（MAU）并追踪最多4个面部。

Deepnote A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, unlimited basic machines with 5GB RAM and 2vCPU, and teams with up to 3 editors. 一款新的数据科学笔记本。Jupyter支持实时协作并在云端运行。免费层包括无限量的个人项目，无限量的基本机器（5GB RAM和2vCPU），以及最多3个编辑器的团队。

Compare JSON An online tool for comparing differences between two JSON data structures, helping you quickly locate the differences in JSON data. 一个在线工具，用于比较两个JSON数据结构之间的差异，帮助您快速定位JSON数据中的差异。

Disease.sh A free API providing accurate data for building the Covid-19 related useful Apps. 一个提供准确数据以构建与Covid-19相关的有用应用的免费API。

Doczilla SaaS API empowering the generation of screenshots or PDFs directly from HTML/CSS/JS code. The free plan allows 250 documents month. SaaS API，允许直接从HTML/CSS/JS代码生成截图或PDF。免费计划每月允许250份文档。

Doppio Managed API to generate and privately store PDFs and Screenshots using top rendering technology. The free plan allows 400 PDFs and Screenshots per month. 一个托管的API，使用顶级渲染技术生成和私有存储PDF和截图。免费计划每月允许400个PDF和截图。

DocPenny HTML to PDF document generation with templates, webhook delivery, and credit-based pricing. Free plan with 50 monthly credits, no credit card required. 带有模板、webhook交付和基于信用计价的HTML到PDF文档生成。免费计划每月提供50个信用额度，无需信用卡。

Doqlo Bulk fill and mail merge PDF forms from CSV using the web app or Public API. The free plan includes 100 output PDFs/month. 使用Web应用程序或公共API从CSV批量填充和合并PDF表格。免费计划包括每月100个输出PDF。

DynamicDocs Generate PDF documents with JSON to PDF API based on LaTeX templates. The free plan allows 50 API calls per month and access to a library of templates. 基于 LaTeX 模板，使用 JSON to PDF API 生成 PDF 文档。免费计划每月允许 50 次API调用并访问模板库。

Earnings Feed Real-time SEC filings, insider trades, and institutional holdings API. Free tier includes 15 requests per minute. 实时 SEC 文件、内部交易和机构持股 API。免费层包括每分钟 15 请求。

Estuary Real-time data integration platform for CDC, streaming, and batch data integration with 200+ managed connectors. Free plan includes 10 GB/month of data movement and up to 2 connector instances, with no time limit and no credit card required. CDC、流数据和批量数据集成的实时数据集成平台，拥有200多个管理连接器。免费计划包括每月10 GB的数据传输量，最多2个连接器实例，无时间限制，无需信用卡。

Export SDK PDF generator API with drag-and-drop template editor that provides an SDK and no-code integrations. The free plan has 250 monthly pages, unlimited users, and three templates. 具有拖放模板编辑器的 PDF 生成器 API，提供 SDK 和无代码集成。免费计划每月 250 页，无限用户和三个模板。

Financial Data Stock market and financial data API. Free plan allows 300 requests per day. 股票市场和金融数据 API。免费计划每天允许 300 请求。

finlight Finlight Real-time financial news API with entity resolution (tickers, ISIN) and sentiment tagging, available over REST, WebSocket, webhooks and an MCP server. Free tier: 5,000 requests/month on both REST and MCP, 12-hour delayed articles, no card required. 实时财经新闻API，具有实体解析（股票代码、ISIN）和情感标签，支持REST、WebSocket、webhooks和MCP服务器。免费层：REST和MCP每月5,000次请求，12小时延迟文章，无需信用卡。

Firecrawl API that crawls websites and converts them into clean, LLM-ready markdown or structured data, handling JavaScript rendering, proxies, and rate limits. The free plan includes 1,000 credits per month with no credit card required. 爬取网站并将它们转换为干净的、LLM 准备好的 markdown 或结构化数据 API，处理 JavaScript 渲染、代理和速率限制。免费计划每月包含 1,000 个积分，无需信用卡。

flaky A mock API where you can paste your JSON and simulate API problems like delays, errors, failed requests, and malformed responses. 1,000 requests per day without a key, or 10,000 requests per day with a free key. There is no paid tier. 一个模拟API，您可以将JSON粘贴到其中并模拟API问题，如延迟、错误、失败的请求和格式不正确的响应。无需密钥每天1,000次请求，或使用免费密钥每天10,000次请求。没有付费等级。

Formfeed API for PDF and image generation from JSON with a simple API or automation tools like Zapier & Make. The free plan includes 100 free PDF conversions per month. 从JSON生成PDF和图像的API，支持简单的API或自动化工具如Zapier & Make。免费计划每月包含100次免费PDF转换。

FraudLabs Pro 欺诈实验室PRO Screen an order transaction for credit card payment fraud. This REST API will detect all possible fraud traits based on the input parameters of an order. The Free Micro plan has 500 transactions per month.

FreeIPAPI Free, Fast and Reliable IP Geolocation API for commercial and non-commercial users available in JSON 免费、快速、可靠的 IP 定位 API，适用于商业和非商业用户，以 JSON 格式提供。

Geolocated.io IP Geolocation API with multi-continent servers, offering a free plan with 2,000 requests per day. 具有多大陆服务器的 IP 定位 API，提供每天 2,000 请求的免费计划。

Hex a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community tier with up to five projects. 一个协作式笔记、数据应用和知识库的数据平台。免费社区版，最多支持五个项目。

Hook0 Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 100 events/day with seven days of history retention for free. Hook0 是一个开源的 Webhooks-as-a-service (WaaS)，使在线产品提供 Webhooks 变得容易。免费版每天最多可调度 100 个事件，并保留 7 天的历史记录。

Hoppscotch A free, fast, and beautiful API request builder. 一个免费、快速且美观的 API 请求构建器。

HS Ping A multi-country HS (Harmonized System) and HTS (Harmonized Tariff System) code lookup API, with a free plan offering 100 lookups/day. 一个多国 HS（协调制度）和 HTS（协调关税制度）代码查找 API，免费计划每天提供 100 次查找。

huggingface.co Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo. 为 Pytorch、TensorFlow 和 JAX 构建、训练和部署 NLP 模型。免费版每月最多支持 30k 个输入字符。

Insomnia Open-source API client for designing and testing APIs, it supports REST and GraphQL 开源的 API 客户端，用于设计和测试 API，支持 REST 和 GraphQL。

Inngest Durable execution and event-driven workflows for TypeScript, Python, and Go. Hobby plan is free with 50k executions/month, 5 concurrent steps, 500k events ingested, and no credit card required. 适用于 TypeScript、Python 和 Go 的持久执行和事件驱动工作流程。爱好计划免费，每月 50k 次执行，5 个并发步骤，500k 个事件处理，无需信用卡。

Invantive Cloud Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in data volumes. 通过 Invantive SQL 或 OData4（通常是 Power BI 或 Power Query）访问 70 多个（云）平台，如 Exact Online、Twinfield、ActiveCampaign 或 Visma。包括数据复制和交换。为开发人员和实施顾问提供免费计划。特定平台免费，数据量有限制。

IP Geolocation API by ipwho.org 2,000 free requests per day. Fast, enterprise grade API at non-enterprise prices. Trusted by developers, corporate, government and education clients. Servers in 12+ regions. 每天 2,000 个免费请求。快速的企业级 API，价格非企业级。被开发者、企业、政府和教育客户信赖。服务器位于 12 个以上地区。

IP Geolocation API IP Geolocation API from Abstract - Allows 1,000 free requests. Abstract 提供的 IP 地理位置API - 允许每天 1,000 个免费请求。

IP Geolocation IP地理定位 IP Geolocation API - Forever free plan for developers with a 1,000 requests per day limit.

ip-api IP Geolocation API, Free for non-commercial use, no API key required, limited to 45 req/minute from the same IP address for the free plan. IP地理位置API，非商业用途免费，无需API密钥，免费计划从同一IP地址限制为每分钟45次请求。

IP.City 100 Free IP geolocation requests per day 每日100次免费IP地理位置请求。

IP2Location.io Freemium, fast, and reliable IP geolocation API. Get data like city, coordinates, ISP, ASN, AS data and more. The free plan includes 50k credits per month. IP2Location.io also offers 500 free WHOIS and hosted domain lookups per month. See domain registration details and find domains hosted on a specific IP. Upgrade to a paid plan for more features. 免费增值，快速且可靠的IP地理位置API。获取城市、坐标、ISP、ASN、AS数据等。免费计划每月包含50,000积分。IP2Location.io还提供每月500次免费WHOIS和托管域名查询。查看域名注册详情，并查找特定IP上托管的域名。升级到付费计划以获得更多功能。

Proxmint GeoIP Free IP → country/city/ASN JSON API, no key, CORS-open. MaxMind GeoLite2. 免费IP → 国家/城市/ASN JSON API，无需密钥，CORS开放。使用MaxMind GeoLite2。

ip2geo.dev IP geolocation API to convert IP addresses into location data including city, country, timezone, ASN, and currency. The free plan includes 1,000 requests per month. IP地理位置API，将IP地址转换为包括城市、国家、时区、ASN和货币在内的位置数据。免费计划每月包含1,000次请求。

ipaddress.sh Simple service to get a public IP address in different formats. 一个简单的服务，用于获取不同格式的公共IP地址。

ipapi.is A reliable IP Address API from Developers for Developers with the best Hosting Detection capabilities that exist. The free plan offers 1000 lookups without signup. 来自开发者的可靠IP地址API，具有最佳的托管检测功能。免费计划提供1,000次查询，无需注册。

ipapi IP Address Location API by Kloudend, Inc - A reliable geolocation API built on AWS, trusted by Fortune 500. The free tier offers 30k lookups/month (1k/day) without signup. Kloudend公司提供的IP地址位置API - 建立在AWS上的可靠地理位置API，被财富500强企业信任。免费层提供每月30,000次查询（每天1,000次），无需注册。

ipbase.com IP Geolocation API - Forever free plan that spans 150 monthly requests. IP地理位置API - 永久免费计划，每月包含150次请求。

IPinfo Fast, accurate, and free (up to 50k/month) IP address data API. Offers APIs with details on geolocation, companies, carriers, IP ranges, domains, abuse contacts, and more. All paid APIs can be trialed for free. 快速、准确且免费的（每月最多50k次）IP地址数据API。提供包含地理位置、公司、运营商、IP范围、域名、滥用联系人等详细信息的相关API。所有付费API均可免费试用。

IPLocate IP Geolocation API, free up to 1,000 requests/day. Includes proxy/VPN/hosting detection, ASN data, IP to Company, and more. IPLocate also offers free downloadable IP to Country and IP to ASN databases in CSV or GeoIP-compatible MMDB formats. IP地理位置API，每天免费请求量高达1,000次。包括代理/VPN/托管检测、ASN数据、IP到公司等信息。IPLocate还提供免费下载的IP到国家数据库和IP到ASN数据库，格式为CSV或GeoIP兼容的MMDB格式。

IPTrace An embarrassingly simple API that provides your business with reliable and helpful IP geolocation data with 50,000 free lookups per month. 一个简单到令人尴尬的API，每月提供50,000次免费查询，为您的企业提供可靠且有用的IP地理位置数据。

JSON IP Returns the Public IP address of the client it is requested from. No registration is required for the free tier. Using CORS, data can be requested using client-side JS directly from the browser. Useful for services monitoring change in client and server IPs. Unlimited Requests. 返回请求客户端的公共IP地址。免费层无需注册。使用CORS，可以直接从浏览器使用客户端JS请求数据。对于监控客户端和服务器IP变化的服务非常有用。请求量无限。

JSON to Table Convert JSON into an interactive table for quick viewing, editing, and sharing online. 将JSON转换为交互式表格，以便快速查看、编辑和在线共享。

JSON2Video A video editing API to automate video marketing and social media videos, programmatically or with no code. 一个视频编辑API，可以自动化视频营销和社交媒体视频，无需代码即可编程或无代码操作。

JSONing Create a fake REST API from a JSON object, and customize HTTP status codes, headers, and response bodies. 从JSON对象创建一个假的REST API，并自定义HTTP状态码、头和响应体。

Labelixa Zebra ZPL label rendering and validation API and browser viewer. Free tier includes an anonymous rendering quota and barcode generation with no watermark, no card required. Zebra ZPL标签渲染和验证API及浏览器查看器。免费层包括匿名渲染配额和带水印的条码生成，无需卡片。

LayerCall Fraud and trust scoring for an IP, email, phone, domain or device in one call, plus authorization and Web Bot Auth verification for AI agents. 1,000 lookups/month free, no card required. 一次调用即可对IP、电子邮件、电话、域名或设备进行欺诈和信任评分，以及AI代理的授权和Web Bot Auth验证。每月1000次免费查询，无需信用卡。

LoginLlama A login security API to detect fraudulent and suspicious logins and notify your customers. Free for 1,000 logins per month. 用于检测欺诈和可疑登录并通知您的客户的登录安全API。每月免费1000次登录。

Market Data API Provides real-time and historical financial data for stocks, options, mutual funds, and more. The Free Forever API tier allows for 100 daily API requests at no charge. 提供股票、期权、共同基金等实时和历史金融数据。免费永久API级别允许每天免费进行100次API请求。

Maxim AI Simulate, evaluate, and observe your AI agents. Maxim is an end-to-end evaluation and observability platform, helping teams ship their AI agents reliably and >5x faster. Free forever for indie developers and small teams (3 seats). 模拟、评估和观察您的AI代理。Maxim是一个端到端评估和可观察性平台，帮助团队可靠且>5倍地更快地部署AI代理。独立开发者和小型团队（3个座位）免费永久使用。

microlink.io 微链接io It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. 50 requests per day, every day free.

Mintlify Modern standard for API documentation. Beautiful and easy-to-maintain UI components, in-app search, and interactive playground. Free for 1 editor. 现代API文档标准。美观且易于维护的UI组件、应用内搜索和交互式沙盒。1个编辑器免费。

MockAPI MockAPI is a simple tool that lets you quickly mock up APIs, generate custom data, and perform operations using a RESTful interface. MockAPI is meant to be a prototyping/testing/learning tool. One project/2 resources per project for free. MockAPI是一个简单的工具，让您可以快速模拟API、生成自定义数据并使用RESTful接口执行操作。MockAPI旨在作为原型设计/测试/学习工具。每个项目免费提供1个项目/2个资源。

Mockerito Free mock REST API service providing realistic data across 9 domains (e-commerce, finance, healthcare, education, recruitment, social media, stock markets, weather, and aviation). No mandatory signup, no API keys, unlimited requests. Perfect for frontend prototyping, API testing, learning and teaching web development. 提供免费模拟REST API服务，提供9个领域（电子商务、金融、医疗保健、教育、招聘、社交媒体、股票市场、天气和航空）的逼真数据。无需强制注册，无需API密钥，无限请求。非常适合前端原型设计、API测试、学习和教学Web开发。

Mockfly Mockfly is a trusted development tool for API mocking and feature flag management. Quickly generate and control mock APIs with an intuitive interface. The free tier offers 500 requests per day. Mockfly是API模拟和功能标志管理的可信开发工具。通过直观的界面快速生成和控制模拟API。免费级别每天提供500次请求。

Mocko.dev Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integration tests. 代理您的API，在云中选择要模拟的端点并检查流量，免费。加快您的开发和集成测试。

Multi-Exit IP Address Checker 多出口IP地址检查器 A free and simple tool to check your exit IP address across multiple nodes and understand how your IP appears to different global regions and services. Useful for testing rule-based DNS splitting tools such as Control D. 一款免费且简单的工具，用于检查您在多个节点上的出口IP地址，并了解您的IP在不同全球地区和服务中的显示方式。适用于测试基于规则的DNS分割工具，如Control D。

NASdisks Drive Data API NASdisks驱动器数据API Free, no-key, CORS-enabled API for NAS HDD/SSD specifications, per-model CMR/SMR classification, and annualized failure rates derived from Backblaze Drive Stats. Returns JSON or CSV, CC BY 4.0, no signup. 免费的、无需密钥、启用CORS的API，用于NAS硬盘/固态硬盘规格、按型号CMR/SMR分类以及来自Backblaze驱动器统计的年度化故障率。返回JSON或CSV，CC BY 4.0，无需注册。

News API 新闻API Search news on the web with code, and get JSON results. Developers get 100 queries free each day. Articles have a 24 hour delay. 使用代码在网络上搜索新闻，并获取JSON结果。开发者每天免费获得100次查询。文章有24小时延迟。

OCR.Space An OCR API parses image and pdf files that return the text results in JSON format. 25,000 requests per month are free and a 1MB file size limit. OCR API解析图像和PDF文件，以JSON格式返回文本结果。每月免费25,000次请求，文件大小限制为1MB。

OpenAPI3 Designer Visually create Open API 3 definitions for free. 免费创建Open API 3定义的视觉设计器。

Parseur 20 free pages/month: Extract data from PDFs, emails. AI powered. Full API access. 每月20页免费：从PDF、电子邮件中提取数据。AI驱动。提供完整的API访问。

PDF-API.io PDF Automation API, visual template editor or HTML to PDF, dynamic data integration, and PDF rendering with an API. The free plan comes with one template, 100 PDFs/month. PDF自动化API，可视化模板编辑器或HTML转PDF，动态数据集成和API渲染PDF。免费计划包含一个模板，每月100份PDF。

PDFBolt Developer-focused PDF generation API designed with privacy in mind. It offers Stripe-inspired documentation and includes 500 free PDF conversions per month. 以开发者为中心的PDF生成API，注重隐私。提供灵感来自Stripe的文档，每月包括500次免费PDF转换。

Pexafy Semantic image search API across 9 free photo sources (Unsplash, Pexels, Pixabay, Kaboompics & more), 9M+ photos under one JSON schema instead of one integration per source. Plain-language queries, reverse image search, filters on color, orientation and license. CORS is open on read endpoints, so it runs from the browser. The free plan includes 5,000 API requests/month and 1 key, no app review. 跨9个免费图片来源（Unsplash、Pexels、Pixabay、Kaboompics等）的语义图像搜索API，包含超过9M张图片，使用统一的JSON模式，而不是每个来源一个集成。使用简单语言的查询，反向图像搜索，可以根据颜色、方向和许可证进行筛选。读取端点上的CORS已开启，因此可以从浏览器中运行。免费计划包括每月5,000次API请求和1个密钥，无需应用审核。

Pixela Free daystream database service. All operations are performed by API. Visualization with heat maps and line graphs is also possible. 免费daystream数据库服务。所有操作都通过API执行。还可以使用热图和折线图进行可视化。

Posthook Schedule webhooks to fire at a future time with automatic retries, delivery tracking, and failure alerting. Free plan includes 1,000 webhooks per month. 计划在未来的某个时间点触发webhook，具有自动重试、投递跟踪和故障警报功能。免费计划每月包含1,000个webhook。

Postman Simplify workflows and create better APIs - faster - with Postman, a collaboration platform for API development. Use the Postman App for free forever. Postman cloud features are also free forever with certain limits. 使用Postman，一个API开发的协作平台，简化工作流程并更快地创建更好的API。Postman App可免费使用。Postman云功能也永久免费，但有某些限制。

PrefectCloud A complete platform for dataflow automation. Free plan includes 5 deployed workflows and 500 minutes of serverless compute credits per month. 数据流自动化的完整平台。免费计划每月包含5个部署的工作流程和500分钟的serverless计算信用。

Preset Cloud A hosted Apache Superset service. Forever free for teams of up to 5 users, featuring unlimited dashboards and charts, a no-code chart builder, and a collaborative SQL editor. 托管Apache Superset服务。最多5用户的团队永久免费，提供无限仪表板和图表、无代码图表构建器和协作SQL编辑器。

ProxySentry IP API that detects residential proxies and VPNs. ProxySentry.io offers a free tier with 10k requests per month on rapidapi.com. 检测住宅代理和VPN的IP API。ProxySentry.io提供免费层，每月在rapidapi.com上有10,000次请求。

Publora Publishing API: post or schedule to 10 social networks with one HTTPS call, or from an AI agent over MCP. Free forever: 15 posts/month, 3 connected accounts, all networks except X. 发布API：通过一个HTTPS调用发布或安排到10个社交网络，或通过MCP从AI代理进行。永久免费：每月15篇帖子，3个连接的账户，除X以外的所有网络。

Reducto Turn any unstructured documents (PDF, XLSX, JPG, PPTX, etc.) into structured JSON data. Parse, extract data, and edit PDF forms. Free tier with 15k free credits and pay-as-you-go. 将任何非结构化文档（PDF、XLSX、JPG、PPTX等）转换为结构化JSON数据。解析、提取数据并编辑PDF表单。免费层提供15,000个免费信用和按需付费。

Rendi FFmpeg API - A REST API for FFmpeg, run FFmpeg online without handling the infrastructure. Free tier with monthly processing quota and 4 vCPUs available. FFmpeg API - FFmpeg的REST API，无需处理基础设施即可在线运行FFmpeg。免费层提供每月处理配额和4个vCPU。

RequestBin.com Create a free endpoint to which you can send HTTP requests. Any HTTP requests sent to that endpoint will be recorded with the associated payload and headers so you can observe recommendations from webhooks and other services. 创建一个免费的端点，您可以向其发送HTTP请求。发送到该端点的任何HTTP请求都将记录相关的有效负载和头信息，以便您可以观察来自webhook和其他服务的建议。

Simplescraper Trigger your webhook after each operation. The free plan includes 100 cloud scrape credits. 每次操作后触发webhook。免费计划包含100次云爬取积分。

Geekflare API Geekflare API lets you scrape websites into Markdown, take screenshots, perform TLS scans and DNS lookups, test load times, and more. The free plan offers 500 API credits per month (e.g., 500 DNS lookups, 250 web scrapes, or 100 screenshots). See credit mapping. Geekflare API允许您将网站爬取为Markdown格式，截图，执行TLS扫描和DNS查找，测试加载时间等。免费计划每月提供500 API积分（例如，500次DNS查找，250次网页爬取或100次截图）。查看积分映射。

SmartParse SmartParse is a data migration and CSV to API platform that offers time- and cost-saving developer tools. The Free tier includes 300 Processing Units per month, Browser uploads, Data quarantining, Circuit breakers, and Job Alerts. SmartParse是一个数据迁移和CSV到API平台，提供节省时间和成本的开发者工具。免费层每月包含300个处理单元，浏览器上传，数据隔离，断路器和作业警报。

Sofodata Create secure RESTful APIs from CSV files. Upload a CSV file and instantly access the data via its API allowing faster application development. The free plan includes 2 APIs and 2,500 API calls per month. You don't need a credit card. 从CSV文件创建安全的RESTful API。上传CSV文件，通过其API立即访问数据，允许更快地开发应用程序。免费计划包含2个API和每月2,500次API调用。无需信用卡。

Svix Webhooks as a Service. Send up to 50,000 messages/month for free. Webhooks即服务。免费发送高达50,000条消息/月。

Tavily AI API for online search and rapid insights and comprehensive research, with the capability of organization of research results. 1000 request/month for the Free tier with No credit card required. 在线搜索和快速洞察以及全面研究的API，具有组织研究结果的能力。免费层每月1000次请求，无需信用卡。

TemplateFox PDF generation API with a visual template editor, dynamic data merging, and SDKs for 7 languages. Free plan includes 60 PDFs/month and 3 templates. 具有可视化模板编辑器、动态数据合并和7种语言的SDK的PDF生成API。免费计划每月包含60个PDF和3个模板。

The IP API IP Geolocation API with 1000 free requests / day. Provides information about the location of an IP address, including country, city, region, and more. 每天1000次免费请求的IP地理定位API。提供有关IP地址位置的信息，包括国家、城市、地区等。

timezone.io Current time, UTC offset and DST for any time zone or IP address, compatible with the shut-down WorldTimeAPI (clients only change the host). Free with no API key or sign-up, 60 requests/minute per IP, over HTTPS or plain HTTP. 任何时区或IP地址的当前时间、UTC偏移量和夏令时，兼容已关闭的WorldTimeAPI（客户端只需更改主机）。免费使用，无需API密钥或注册，每个IP每分钟60次请求，通过HTTPS或纯HTTP。

TinyMCE rich text editing API. Core features are free for unlimited usage. 富文本编辑API。核心功能免费使用，无限制。

Tomorrow.io Weather API Offers free plan of weather API. Provides accurate and up-to-date weather forecasting with global coverage, historical data and weather monitoring solutions. 提供免费计划的天气API。提供全球覆盖、历史数据和天气监测解决方案的准确且最新的天气预报。

Treblle Treblle helps teams build, ship, and govern APIs. With advanced API log aggregation, observability, docs, and debugging. You get all features for free, but there is a limit of up to 250k requests per month on the free tier. Treblle帮助团队构建、发布和管理API。具有高级API日志聚合、可观察性、文档和调试功能。免费版提供所有功能，但免费层每月请求限制为最多250k次。

Trophy Trophy is the gamification layer for consumer apps. Use pre-built APIs and open-source UI components to ship achievements, streaks, points, leaderboards and more. Free for up to 1,000 monthly active users. Trophy是消费者应用的游戏化层。使用预构建的API和开源UI组件来发布成就、连赢、积分、排行榜等。免费版最多支持1,000个每月活跃用户。

UniRateAPI Real-time exchange rates for 590+ currencies and crypto. Unlimited API calls on the free plan, perfect for developers and finance apps. 590多种货币和加密货币的实时汇率。免费计划无限次API调用，非常适合开发者和金融应用。

URLpipe Read any page after its JavaScript runs: Markdown, screenshots, metadata, console errors and Lighthouse audits. Free 1000 credits per month. 在JavaScript运行后读取任何页面：Markdown、截图、元数据、控制台错误和Lighthouse审计。每月免费1000积分。

vatcheckapi.com Simple and free VAT number validation API. 150 free validations per month. 简单免费的增值税号验证API。每月150次免费验证。

vatnode EU VAT number validation REST API with VIES and national tax-registry fallback, returning the official VIES consultation number for audit records. Free tier of 100 validations/month, no credit card. 具有VIES和国家税务登记回退的欧盟增值税号验证REST API，返回官方VIES咨询号以供审计记录。免费层每月100次验证，无需信用卡。

WeatherXu Global weather data including current conditions, hourly and daily forecasts, and weather alerts via our API. Integrating AI models and ML systems to analyze and combine multiple weather models to deliver improved forecast accuracy. Free tier includes 10,000 API calls/month. 通过我们的API提供全球天气数据，包括当前条件、每小时和每日预报以及天气警报。通过集成AI模型和ML系统分析并结合多个天气模型，以提供改进的预报准确性。免费层每月包括10,000次API调用。

Webhooker Webhook gateway hosted in Germany. Signature verification, retries, dead letter queue and replay. Free plan: 10,000 events per month. 位于德国的Webhook网关。签名验证、重试、死信队列和重放。免费计划：每月10,000个事件。

WebScraping.AI Simple Web Scraping API with built-in parsing, Chrome rendering, and proxies. Two thousand free API calls per month. 简单的网络抓取API，具有内置解析、Chrome渲染和代理。每月2,000次免费API调用。

Weights & Biases The developer-first MLOps platform. Build better models faster with experiment tracking, dataset versioning, and model management. Free tier for personal projects only, with 100 GB of storage included. 面向开发者的MLOps平台。通过实验跟踪、数据集版本控制和模型管理，更快地构建更好的模型。仅个人项目免费，包含100 GB的存储空间。

What Is My IP A free service to check your public IPv4 and IPv6 address and related request data through an API with different output formats for automation, scripts, and network troubleshooting. 一个免费服务，通过API检查您的公共IPv4和IPv6地址以及相关请求数据，支持不同的输出格式以实现自动化、脚本和网络故障排除。

What The Diff AI-powered code review assistant. The free plan has a limit of 25,000 monthly tokens (~10 PRs). AI驱动的代码审查助手。免费计划每月限制25,000个令牌（约10个PR）。

XFlux X/Twitter read REST API (profiles, search, timelines) plus account monitors. Free tier: 1,000 API calls/month, 1 monitor, instant API key. HTTP webhooks on paid plans from $19/mo. X/Twitter读取REST API（个人资料、搜索、时间线）以及账户监控器。免费层：每月1,000次API调用，1个监控器，即时API密钥。付费计划从每月19美元起提供HTTP网络钩子。

wolfram.com Built-in knowledge-based algorithms in the cloud. 云中的内置基于知识的算法。

wrapapi.com Turn any website into a parameterized API. 30k API calls per month. 将任何网站转换为参数化API。每月30,000次API调用。

Zipcodebase Free Zip Code API, access to Worldwide Postal Code Data. 5,000 free requests/month. 免费的邮编API，访问全球邮政编码数据。每月5,000次免费请求。

Zuplo Free API Management platform to design, build, and deploy APIs to the Edge. Add API Key authentication, rate limiting, developer documentation and Monetization to any API in minutes. OpenAPI-native and fully-programmable with web standard apis & Typescript. The free plan offers up to 10 projects, unlimited production edge environments, 1M monthly requests, and 10GB egress. 免费的API管理平台，用于设计、构建和部署到边缘的API。几分钟内为任何API添加API密钥身份验证、速率限制、开发者文档和货币化。原生OpenAPI和完全可编程，使用Web标准API和TypeScript。免费计划提供最多10个项目、无限的生产边缘环境、每月1,000,000次请求和10GB出口。

Metashot Open Graph (OG) social preview image generation API. Generate dynamic 1200×630 images for Twitter, LinkedIn and Facebook via URL params, edge-cached on Cloudflare Workers. Free tier: 1,000 renders/month. Paid plans from $12/month. Open Graph (OG) 社交预览图片生成 API。通过 URL 参数生成动态 1200×630 图片，用于 Twitter、LinkedIn 和 Facebook，通过 Cloudflare Workers 边缘缓存。免费套餐：每月 1,000 次渲染。付费套餐从每月 12 美元起。

Tinyfish Free web search and fetch API with rate limits. 免费的网络搜索和抓取API，具有速率限制。

Artifact Repos

Gemfury Private and public artifact repos for Maven, PyPi, NPM, Go Module, Nuget, APT, and RPM repositories. Free for public projects. 为 Maven、PyPi、NPM、Go Module、Nuget、APT 和 RPM 仓库提供私有和公共工件存储库。公共项目免费。

jitpack.io Maven repository for JVM and Android projects on GitHub, free for public projects. GitHub 上 JVM 和 Android 项目的 Maven 仓库，公共项目免费。

paperspace Build & scale AI models, Develop, train, and deploy AI applications, free plan: public projects, 5Gb storage, basic instances. 构建和扩展 AI 模型，开发、训练和部署 AI 应用程序，免费套餐：公共项目，5Gb 存储空间，基本实例。

RepoFlow RepoFlow Simplifies package management with support for npm, PyPI, Docker, Go, Helm, and more. Try it for free with 10GB storage, 10GB bandwidth, 100 packages, and unlimited users in the cloud, or self-hosted for personal use only. RepoFlow 简化了包管理，支持 npm、PyPI、Docker、Go、Helm 等。免费试用，包括 10GB 存储空间、10GB 带宽、100 个包和云中无限用户，或仅限个人使用的自托管版本。

RepoForge Private cloud-hosted repository for Python, Debian, NPM packages and Docker registries. Free plan for open source/public projects. Python、Debian、NPM 软件包和 Docker 仓库的私有云托管存储库。开源/公共项目免费套餐。

repsy.io 1 GB Free private/public Maven Repository. 1 GB 免费私有/公共 Maven 存储库。

Tools for Teams and Collaboration

3Cols A free cloud-based code snippet manager for personal and collaborative code. 个人和协作代码的免费云代码片段管理器。

BookmarkOS.com Free all-on-one bookmark manager, tab manager, and task manager in a customizable online desktop with folder collaboration. 免费的集成式书签管理器、标签页管理器和任务管理器，可在可定制的在线桌面中使用，支持文件夹协作。

Braid Chat app designed for teams. Free for public access group, unlimited users, history, and integrations. also, it provides a self-hostable open-source version. 为团队设计的聊天应用。公共访问群组免费，无限用户、历史记录和集成。同时提供可自托管的开源版本。

Calendly Calendly is the tool for connecting and scheduling meetings. The free plan provides 1 Calendar connection per user and Unlimited sessions. Desktop and Mobile apps are also offered. Calendly是一款连接和安排会议的工具。免费计划为每位用户提供1个日历连接和无限会议次数。同时提供桌面和移动应用程序。

cally.com Find the perfect time and date for a meeting. Simple to use, works great for small and large groups. 找到会议的完美时间和日期。简单易用，非常适合小型和大型团队。

cDox Private document editor hosted in Canada. Write, format, collaborate, and publish documents with clean public links. Data is never used for AI training. Free plan includes 50 MB storage, up to 3 public links, and export to PDF, Word, and Markdown. 加拿大托管的私有文档编辑器。使用干净的公开链接编写、格式化、协作和发布文档。数据永远不会用于AI训练。免费计划包括50MB存储空间，最多3个公开链接，以及导出为PDF、Word和Markdown格式。

Chanty.com Chanty is another alternative to Slack. It has a free forever plan for small teams (up to 10) with unlimited public and private conversations, searchable history, unlimited 1:1 audio calls, unlimited voice messages, ten integrations, and 20 GB storage per team. Chanty是Slack的另一种选择。它为小型团队（最多10人）提供免费的永久计划，包括无限公共和私人对话、可搜索的历史记录、无限1:1音频通话、无限语音消息、十个集成以及每个团队20GB的存储空间。

DevToolLab Online developer tools offering free access to all basic tools, with the ability to auto save one entry per tool, standard processing speed, and community support. 在线开发者工具，提供对所有基本工具的免费访问，每个工具可以自动保存一个条目，标准处理速度和社区支持。

Discord Chat with public/private rooms. Markdown text, voice, video, and screen sharing capabilities. Free for unlimited users. 在公共/私人房间中进行聊天。支持Markdown文本、语音、视频和屏幕共享功能。免费提供给无限用户。

Dubble Free Step-by-Step Guide creator. Take screenshots, document processes and collaborate with your team. Also supports async screen recording. 免费的步骤指南创建器。截图、记录流程并与团队协作。还支持异步屏幕录制。

Duckly Talk and collaborate in real time with your team. Pair programming with IDE, terminal sharing, voice, video, and screen sharing. Free for small teams. 与您的团队实时交谈和协作。使用IDE进行结对编程、终端共享、语音、视频和屏幕共享。免费提供给小型团队。

element.io A decentralized and open-source communication tool built on Matrix. Group chats, direct messaging, encrypted file transfers, voice and video chats, and easy integration with other services. 基于Matrix构建的去中心化和开源通信工具。群聊、直接消息、加密文件传输、语音和视频通话，以及与其他服务的轻松集成。

evernote.com Tool for organizing information. Share your notes and work together with others 组织信息工具。分享您的笔记并与他人协作。

Fibery Connected workspace platform. Free for single users, up to 2 GB disk space. 连接的工作空间平台。单用户免费，最高2GB磁盘空间。

Fibo A free online realtime scrum poker tool for agile teams that lets unlimited members estimate story points for faster planning. 一款免费的在线实时敏捷团队Scrum Poker工具，允许无限成员估算故事点，以实现更快规划。

Fizzy Kanban-based platform for project management and issue tracking. Create public boards, set up webhooks, use card stamping, and track unlimited users - free for up to 1000 items. 基于看板的项目管理和问题跟踪平台。创建公共看板，设置webhooks，使用卡片盖章，跟踪无限用户 - 最高1000项免费。

flat.social Interactive customizable spaces for team meetings & happy hours socials. Unlimited meetings, free up to 8 concurrent users. 团队会议和社交晚宴的互动自定义空间。无限会议，最多8个并发用户免费。

flock.com A faster way for your team to communicate. Free Unlimited Messages, Channels, Users, Apps & Integrations 团队沟通的更快方式。免费无限消息、频道、用户、应用和集成。

GhostChat Privacy-first live chat widget for websites (~15KB, no cookies, no tracking). Free plan includes 1 site, unlimited messages, a built-in AI chatbot (25 replies/mo), 30-day history, Gmail threading, canned responses and push notifications. No credit card required. 以隐私为先的网站实时聊天插件（约15KB，无cookies，无追踪）。免费计划包括1个网站，无限消息，内置AI聊天机器人（每月25次回复），30天历史记录，Gmail线程，预设回复和推送通知。无需信用卡。

GitBook Platform for capturing and documenting technical knowledge - from product docs to internal knowledge bases and APIs. Free plan for individual developers. 用于捕捉和记录技术知识平台 - 从产品文档到内部知识库和API。为个人开发者提供免费计划。

GitDailies Daily reports of your team's Commit and Pull Request activity on GitHub. Includes Push visualizer, peer recognition system, and custom alert builder. The free tier has unlimited users, three repos, and 3 alert configs. GitHub上团队提交和拉取请求活动的每日报告。包括推送可视化器、同行认可系统和自定义警报构建器。免费层提供无限用户、三个仓库和3个警报配置。

gitter.im Chat, for GitHub. Unlimited public and private rooms, free for teams of up to 25 GitHub的聊天工具。无限公共和私人房间，最多25人团队免费。

gokanban.io Syntax-based, no registration Kanban Board for fast use. Free with no limitations. 基于语法的、无需注册的看板，快速使用。免费且无限制。

Hackmd.io Real time collaboration & writing tool for markdown format docs/files. Like Google Docs but for markdown files. Free unlimited number of "notes", but the number of collaborators (invitee) for private notes & template will be limited. Markdown格式的文档/文件实时协作与写作工具。类似于Google Docs，但针对Markdown文件。免费提供无限数量的“笔记”，但私人笔记和模板的协作者（受邀者）数量有限。

HeySpace Task management tool with chat, calendar, timeline and video calls. Free for up to 5 users. 具有聊天、日历、时间轴和视频通话的任务管理工具。最多5个用户免费。

Huly All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion) - unlimited users, 10GB storage per workspace, 10GB video(audio) traffic. 一站式项目管理平台（Linear、Jira、Slack、Notion、Motion的替代品）- 无限用户，每个工作区10GB存储空间，10GB视频（音频）流量。

Keybase Keybase is a FOSS alternative to Slack; it keeps everyone's chats and files safe, from families to communities to companies. Keybase是一个开源的Slack替代品；它确保每个人的聊天和文件安全，从家庭到社区到公司。

Knocket Free-forever contact layer for indie developers and small teams: live chat widget for websites and mobile apps (iOS/Android/Flutter/React Native via WebView), a shareable contact page (Linktree-style with socials, booking links, and blog), and a unified Telegram/email inbox. Reply from Telegram directly (no dashboard needed). Meeting scheduler, multi-language, light/dark themes. Companion open-source AI auto-reply agent. No ads, no seat limits. 专为独立开发者和小型团队提供的免费永久性联系层：网站和移动应用（iOS/Android/Flutter/React Native通过WebView）的实时聊天小部件，一个可分享的联系页面（类似Linktree风格，包含社交、预订链接和博客），以及统一的Telegram/电子邮件收件箱。可以直接从Telegram回复（无需仪表板）。会议调度器，多语言，浅色/深色主题。配套开源AI自动回复代理。无广告，无座位限制。

Linkinize Bookmark manager for teams with tagging, multi-workspaces, and collaboration. Free plan includes 4 workspaces and 10 team members. 具有标签、多工作区和协作功能的团队书签管理器。免费计划包括4个工作区和10名团队成员。

Lockitbot Reserve and lock shared resources within Slack like Rooms, Dev environments , servers etc. Free for upto 2 resources 在Slack中预定和锁定共享资源，如房间、开发环境、服务器等。最多2个资源免费。

meet.jit.si One-click video conversations, and screen sharing, for free 一键式免费视频对话和屏幕共享。

Miro Scalable, secure, cross-device, and enterprise-ready collaboration whiteboard for distributed teams. With a freemium plan. 可扩展、安全、跨设备、适用于企业的分布式团队协作白板。提供免费增值计划。

Notion Notion is a note-taking and collaboration application with markdown support that integrates tasks, wikis, and databases. The company describes the app as an all-in-one workspace for note-taking, project management and task management. In addition to cross-platform apps, it can be accessed via most web browsers. Notion是一款支持Markdown的笔记和协作应用，集成了任务、维基和数据库。该公司将该应用描述为笔记、项目管理以及任务管理的全能工作区。除了跨平台应用外，它还可以通过大多数网络浏览器访问。

Nuclino A lightweight and collaborative wiki for all your team's knowledge, docs, and notes. Free plan with all essential features, up to 50 items, and 5GB storage. 一款轻量级且协作的团队知识库、文档和笔记工具。提供免费计划，包含所有基本功能，最多50个项目和5GB存储空间。

OnlineInterview.io Free code interview platform with embedded video chat, drawing board, and online code editor where you can compile and run your code on the browser. You can create a remote interview room with just one click. 一款免费的代码面试平台，内置视频聊天、绘图板和在线代码编辑器，您可以在浏览器中编译和运行代码。只需一键即可创建远程面试室。

paste.sh This is a JavaScript and the Crypto based simple paste site. 这是一个基于JavaScript和加密的简单粘贴网站。

Pastefy Beautiful and simple Pastebin with optional Client-Encryption, Multitab-Pastes, an API, a highlighted Editor and more. 美观简单的在线粘贴板，可选客户端加密、多标签粘贴、API、高亮编辑器等。

Pendulums Pendulums is a free time tracking tool that helps you manage your time in a better manner with an easy-to-use interface and valuable statistics. Pendulums是一款免费的时间跟踪工具，它通过易于使用的界面和有价值的统计数据帮助您更好地管理时间。

Proton Pass Password manager with built-in email aliases, 2FA authenticator, sharing and passkeys. Available on web, browser extension, and mobile app and desktop. 内置电子邮件别名、2FA认证器、共享和密钥的密码管理器。可在网页、浏览器扩展、移动应用和桌面应用上使用。

Pullflow Pullflow offers an AI-enhanced platform for code review collaboration across GitHub, Slack, and VS Code. Pullflow提供了一个增强人工智能的平台，用于在GitHub、Slack和VS Code之间进行代码审查协作。

Pumble Free team chat app. Unlimited users and message history, free forever. 一款免费的团队聊天应用。无限制用户和消息历史，永久免费。

Quidlo Timesheets A simple timesheet and time tracking app for teams. The free plan has time tracking and generating reports features for up to 10 users. 一款简单的团队时间表和时间跟踪应用。免费计划包含最多10个用户的时间跟踪和生成报告功能。

Raindrop.io Private and secure bookmarking app for macOS, Windows, Android, iOS, and Web. Free Unlimited Bookmarks and Collaboration. 适用于macOS、Windows、Android、iOS和Web的私有和安全的书签应用。提供免费无限书签和协作功能。

Reezn.io Spec-driven development workflow for teams: shifts review left so problems get caught before code is written, instead of piling up in code review. Builds a knowledge graph of your business as you go, which the AI agents use for later features. Free plan: 3 seats, 1 project, 5 features/month. 为团队提供的基于规范的开发工作流程：将审查移至左侧，以便在编写代码之前发现问题，而不是在代码审查中累积。在您进行的过程中构建您的业务知识图谱，AI代理将用于后续功能。免费计划：3个座位，1个项目，每月5个功能。

Revolt.chat An OpenSource alternative forDiscord, that respects your privacy. It also have most proprietary features from discord for free. Revolt is a all in one application that is secure and fast, while being 100% free. every features are free. They also have (official & unofficial) plugins support unlike most main-stream chatting applications. Discord的开源替代方案，尊重您的隐私。它还免费提供Discord的大部分专有功能。Revolt是一个集成的应用程序，安全快速，100%免费。所有功能都是免费的。它们还支持（官方和非官方）插件，这与大多数主流聊天应用程序不同。

Rocket.Chat Open-source communication platform with Omnichannel features, Matrix Federation, Bridge with others apps, Unlimited messaging, and Full messaging history. 具有多渠道功能的开源通信平台，Matrix联盟，与其他应用程序的桥接，无限消息，以及完整消息历史。

ruttl.com The best all-in-one feedback tool to collect digital feedback and review websites, PDFs, and images. 收集数字反馈和审查网站、PDF和图像的最佳一站式反馈工具。

Screen Sharing via Browser 通过浏览器屏幕共享 Free screen sharing tool, share your screen with collabrators right from your browser, no download or registration needed. For free. 免费的屏幕共享工具，直接从您的浏览器与同事共享屏幕，无需下载或注册。免费提供。

seafile.com Private or cloud storage, file sharing, sync, discussions. The cloud version has just 1 GB 私有或云存储，文件共享，同步，讨论。云版本仅有1GB。

Sharry Screen sharing via the browser, no downloads, no installs. Useful for pair programming, presentations or remote support. Free tier: no account, 5-minute sessions, 1 viewer. 通过浏览器进行屏幕共享，无需下载或安装。适用于结对编程、演示或远程支持。免费层：无需账户，5分钟会话，1个观看者。

SiteDots Share feedback for website projects directly on your website, no emulation, canvas or workarounds. Completely functional free tier. 直接在您的网站上分享网站项目的反馈，无需仿真、画布或解决方案。完全功能的免费层。

Slab A modern knowledge management service for teams. Free for up to 10 users. 为团队提供的一种现代知识管理服务。最多10个用户免费。

slack.com Free for unlimited users with some feature limitations 对于一些功能有限制，但对无限用户免费。

StatusPile A status page of status pages. Could you track the status pages of your upstream providers? 状态页面的状态页面。您能跟踪您上游提供商的状态页面吗？

Stickies stickies Visual collaboration app used for brainstorming, content curation, and notes. Free for up to 3 Walls, unlimited users, and 1 GB storage. 用于头脑风暴、内容整理和笔记的视觉协作应用。最多3面墙免费，无限用户，1 GB存储空间。

MeetBackdrops Free HD virtual backgrounds for video calls on Zoom, Microsoft Teams, and Google Meet. 1,000+ studio-designed environments with no signup required. 为Zoom、Microsoft Teams和Google Meet提供的免费高清虚拟背景。1000多个由工作室设计的环境，无需注册。

talky.io Free group video chat. Anonymous. Peer‑to‑peer. No plugins, signup, or payment required 免费群组视频聊天。匿名。点对点。无需插件、注册或支付。

Teamcamp All-in-one project management application for software development companies. 软件开发公司的一站式项目管理应用。

Teamhood Free Project, Task, and Issue-tracking software. Supports Kanban with Swimlanes and full Scrum implementation. Has integrated time tracking. Free for five users and three project portfolios. 免费的项目、任务和问题跟踪软件。支持带有泳道的看板和完整的Scrum实施。具有集成的时间跟踪功能。最多支持5个用户和3个项目组合。

Teamplify improve team development processes with Team Analytics and Smart Daily Standup. Includes full-featured Time Off management for remote-first teams. Free for small groups of up to 5 users. 通过团队分析和智能每日站立会议改进团队开发流程。包括针对远程优先团队的完整功能休假管理。最多支持5个用户的免费小团队。

TeamSort Free tool to vote on a shared list and rank items together. Create a ranked-choice poll in seconds - no signup. 一个免费的投票工具，可以共同对共享列表中的项目进行排名。几秒钟内创建一个排名选择调查，无需注册。

Telegram Telegram is for everyone who wants fast, reliable messaging and calls. Business users and small teams may like the large groups, usernames, desktop apps, and powerful file-sharing options. 适用于所有希望快速、可靠的短信和通话的人。商务用户和小型团队可能会喜欢大型群组、用户名、桌面应用和强大的文件共享选项。

Tencent RTC Tencent Real-Time Communication (TRTC) offers solutions for group audio/video calls.10,000 free minutes/month for the first year. 腾讯实时通信（TRTC）提供群组音频/视频通话解决方案。第一年每月提供10,000分钟免费通话时间。

TimeCamp Free time tracking software for unlimited users. Easily integrates with PM tools like Jira, Trello, Asana, etc. 无限用户的免费时间跟踪软件。易于与Jira、Trello、Asana等项目管理工具集成。

tldraw.com Free open-source white-boarding and diagramming tool with intelligent arrows, snapping, sticky notes, and SVG export features. Multiplayer mode for collaborative editing. Free official VS Code extension available as well. 具有智能箭头、吸附、便利贴和SVG导出功能的免费开源白板和绘图工具。支持多人协作编辑模式。还提供免费的官方VS Code扩展。

transfernow simplest, fastest and safest interface to transfer and share files. Send photos, videos and other large files without a mandatory subscription. 最简单、最快、最安全的文件传输和共享界面。无需强制订阅即可发送照片、视频和其他大文件。

Tugboat Preview every pull request, automated and on-demand. Free for all, complimentary Nano tier for non-profits. 预览每个拉取请求，自动化和按需。对所有用户免费，为非营利组织提供免费Nano级别服务。

twist.com An asynchronous-friendly team communication app where conversations stay organized and on-topic. Free and Unlimited plans are available. Discounts are provided for eligible teams. 一个异步友好的团队沟通应用，其中对话保持有序和主题相关。提供免费和无限制计划。符合条件的团队可享受折扣。

userforge.com Interconnected online personas, user stories and context mapping. Helps keep design and dev in sync free for up to 3 personas and two collaborators. 互联的在线形象、用户故事和上下文映射。免费为最多3个形象和两个协作者提供设计开发同步。

Visual Debug A Visual feedback tool for better client-dev communication 一个用于改善客户-开发者沟通的视觉反馈工具。

Webex Video meetings with a free plan offering 40 minutes per meeting with 100 attendees. 提供免费计划的视频会议，每次会议40分钟，最多100位参会者。

Webvizio Website feedback tool, website review software, and bug reporting tool for streamlining web development collaboration on tasks directly on live websites and web apps, images, PDFs, and design files. 网站反馈工具、网站审查软件和错误报告工具，用于简化直接在实时网站和Web应用、图片、PDF和设计文件上的Web开发协作。

whereby.com One-click video conversations, for free (formerly known as appear.in) 一键式视频对话，免费使用（之前称为appear.in）。

windmill.dev Windmill is an open-source developer platform to quickly build production-grade multi-step automation and internal apps from minimal Python and Typescript scripts. As a free user, you can create and be a member of at most three non-premium workspaces. Windmill是一个开源的开发者平台，可以快速从最小的Python和Typescript脚本构建生产级别的多步骤自动化和内部应用。作为免费用户，您最多可以创建和加入三个非高级工作空间。

wistia.com Video hosting with viewer analytics, HD video delivery, and marketing tools to help understand your visitors, 25 videos, and Wistia branded player 视频托管服务，提供观众分析、高清视频传输和营销工具，帮助您了解您的访客，包含25个视频和Wistia品牌播放器。

wormhol.org Straightforward file sharing service. Share unlimited files up to 5GB with as many peers as you want. 简单的文件分享服务。可以与任意数量的同伴分享高达5GB的无限制文件。

Wormhole Share files up to 5GB with end-to-end encryption for up to 24hours. For files larger than 5 GB, it uses peer-to-peer transfer to send your files directly. 提供端到端加密，最多可分享24小时的5GB文件。对于大于5GB的文件，它使用点对点传输直接发送文件。

zoom.us Secure Video and Web conferencing add-ons available. The free plan is limited to 40 minutes. 提供安全视频和网页会议插件。免费计划限制为40分钟。

Zulip Real-time chat with a unique email-like threading model. The free plan includes 10,000 messages of search history and File storage up to 5 GB. also, it provides a self-hostable open-source version. 具有独特电子邮件式线程模型的实时聊天。免费计划包括10,000条消息的搜索历史记录和高达5GB的文件存储。此外，它还提供可自托管的开源版本。

RightFeature Easily collect feedback from your customers, turn customer feedback into your product roadmap. Collect, prioritize, and ship features that actually matter to your users. 轻松收集客户反馈，将客户反馈转化为您的产品路线图。收集、优先排序并发布对用户真正重要的功能。

Zeitio Time tracking and invoicing for freelancers and small teams. Free plan includes 1 user, 3 active projects and 3 invoices per month. 为自由职业者和小型团队提供时间跟踪和发票服务。免费计划包括每月1个用户、3个活跃项目和3张发票。

CMS

Contentful Headless CMS. Content management and delivery APIs in the cloud. Comes with one free Community space that includes five users, 25K records, 48 Content Types, 2 locales. 无头CMS。云中的内容管理和交付API。包含一个免费的社区空间，包括五个用户、25K条记录、48种内容类型和2个区域。

Cosmic Headless CMS and API toolkit. Free personal plans for developers. 无头CMS和API工具包。为开发者提供免费个人计划。

Crystallize Headless PIM with ecommerce support. Built-in GraphQL API. The free version includes unlimited users, 1000 catalog items, 5 GB/month bandwidth, and 25k/month API calls. 支持电商的无头PIM。内置GraphQL API。免费版本包括无限用户、1000个目录项目、每月5GB带宽和每月25k次API调用。

DatoCMS Offers free tier for small projects. DatoCMS is a GraphQL-based CMS. On the lower tier, you have 100k/month calls. 为小型项目提供免费层。DatoCMS是基于GraphQL的CMS。在较低层，您有每月100k次调用。

Hygraph Offers free tier for small projects. GraphQL first API. Move away from legacy solutions to the GraphQL native Headless CMS - and deliver omnichannel content API first. 为小型项目提供免费层。GraphQL优先API。从遗留解决方案迁移到GraphQL原生无头CMS - 首先提供全渠道内容API。

Prismic Headless CMS. Content management interface with fully hosted and scalable API. The Community Plan provides unlimited API calls, documents, custom types, assets, and locales to one user. Everything that you need for your next project. Bigger free plans are available for Open Content/Open Source projects. 无头CMS。具有完全托管和可扩展API的内容管理界面。社区计划为一名用户提供无限API调用、文档、自定义类型、资产和区域。为您的下一个项目提供您所需的一切。更大的免费计划适用于开放内容/开源项目。

Sanity.io Platform for structured content with an open-source editing environment and a real-time hosted data store. Unlimited projects. Unlimited admin users, three non-admin users, two datasets, 500K API CDN requests, 10GB bandwidth, and 5GB assets included for free per project. 具有开源编辑环境和实时托管数据存储的标准化内容平台。无限项目。无限管理员用户，三个非管理员用户，两个数据集，每个项目免费包含500K API CDN请求、10GB带宽和5GB资产。

Solo Free AI website creator from Mozilla, create a beautiful website for your business from a few simple inputs. Free custom domain, no credit card needed. Mozilla提供的免费AI网站创建工具，从几个简单的输入中为您的业务创建一个美丽的网站。免费自定义域名，无需信用卡。

Squidex Offers free tier for small projects. API / GraphQL first. Open source and based on event sourcing (versing every change automatically). 为小型项目提供免费层。API/GraphQL优先。开源且基于事件源（自动记录每个更改）。

Storyblok A Headless CMS for developers and marketers that works with all modern frameworks. The Community (free) tier offers Management API, Visual Editor, ten sources, Custom Field Types, Internationalization (unlimited languages/locales), Asset Manager (up to 2500 assets), Image Optimizing Service, Search Query, Webhook + 250GB Traffic/month included. 适用于开发人员和营销人员的无头CMS，与所有现代框架协同工作。社区（免费）层提供管理API、可视化编辑器、十个来源、自定义字段类型、国际化（无限语言/区域）、资产管理器（最多2500个资产）、图像优化服务、搜索查询、Webhook + 每月250GB流量。

TinaCMS Replacing Forestry.io. Open source Git-backed headless CMS that supports Markdown, MDX, and JSON. The basic offer is free with two users available. 取代Forestry.io。支持Markdown、MDX和JSON的开源Git支持的头部CMS。基本服务免费，提供两个用户。

WPJack Set up WordPress on any cloud in less than 5 minutes! The free tier includes 1 server, 2 sites, free SSL certificates, and unlimited cron jobs. No time limits or expirations-your website, your way. 在不到5分钟内在任何云上设置WordPress！免费层包括1个服务器、2个网站、免费SSL证书和无限cron作业。无时间限制或到期日期-您的网站，您的选择。

Code Generation

Appinvento A free no-code app builder. It provides complete access to the automatically generated backend source code and allows for unlimited APIs and routes. The free plan includes three projects and five tables. 免费的零代码应用程序构建器。它提供对自动生成的后端源代码的完全访问权限，并允许无限API和路由。免费计划包括三个项目和五个表。

DhiWise Converts Figma designs into dynamic Flutter and React applications. Its code generation technology is designed to optimize workflows for building production-ready mobile and web experiences. 将Figma设计转换为动态Flutter和React应用程序。其代码生成技术旨在优化构建生产就绪的移动和Web体验的工作流程。

Karbon Sites An AI-powered site builder and editor that generates production-ready frontend code from text prompts, sketches, or resumes. Features include native Android (APK) export and a free tier with 5 generations per month (unlimited via custom Gemini API key). 一款基于AI的网站构建和编辑器，可以从文本提示、草图或简历生成可用于生产的前端代码。功能包括原生Android（APK）导出和每月5次免费生成（通过自定义Gemini API密钥无限次）的免费层。

Metalama A C#-specific tool that generates boilerplate code on the fly during compilation to keep source code clean. It is free for open-source projects; its commercial-friendly free tier includes up to three aspects. 一款针对C#的工具，在编译过程中动态生成样板代码以保持源代码整洁。对于开源项目是免费的；其商业友好的免费层包括最多三个方面。

Supermaven A high-speed AI code completion plugin for VS Code, JetBrains, and Neovim. The free tier provides unlimited inline completions with a focus on ultra-low latency. 适用于VS Code、JetBrains和Neovim的高速AI代码补全插件。免费层提供无限次的内联补全，重点在于超低延迟。

v0.dev Created by Vercel, v0 generates copy-and-paste friendly React code using shadcn/ui and Tailwind CSS. It uses a credit system, providing 1,200 starting credits and 200 free credits monthly. 由Vercel创建，v0使用shadcn/ui和Tailwind CSS生成易于复制粘贴的React代码。它使用积分系统，提供1,200个起始积分和每月200个免费积分。

Code Quality

beanstalkapp.com A complete workflow to write, review, and deploy code), a free account for one user, and one repository with 100 MB of storage 一个完整的编写、审查和部署代码的工作流程，一个用户免费账户，一个包含100 MB存储空间的仓库。

codacy.com Automated code reviews for PHP, Python, Ruby, Java, JavaScript, Scala, CSS, and CoffeeScript, free for unlimited public and private repositories 为PHP、Python、Ruby、Java、JavaScript、Scala、CSS和CoffeeScript提供自动代码审查，免费用于无限个公共和私有仓库。

Codeac.io Automated Infrastructure as Code review tool for DevOps integrates with GitHub, Bitbucket, and GitLab (even self-hosted). In addition to standard languages, it also analyzes Ansible, Terraform, CloudFormation, Kubernetes, and more. (open-source free) 自动基础设施即代码审查工具，适用于DevOps，可与GitHub、Bitbucket和GitLab（即使是自托管的）集成。除了标准语言外，它还分析Ansible、Terraform、CloudFormation、Kubernetes等。（开源免费）

codecov.io Code coverage tool (SaaS), free for Open Source and one free private repo 代码覆盖率工具（SaaS），开源免费，一个私有仓库免费。

CodeFactor Automated Code Review for Git. The free version includes unlimited users, public repositories, and one private repo. Git的自动代码审查。免费版本包括无限用户、公共仓库和一个私有仓库。

coderabbit.ai AI-powered code review tool that integrates with GitHub/GitLab. Free tier includes 200 files/hour, 3 reviews per hour, and 50 conversations/hour. Free forever for open source projects. 一款集成了GitHub/GitLab的AI代码审查工具。免费层包括每小时200个文件、每小时3次审查和每小时50次对话。开源项目永久免费。

CodSpeed Automate performance tracking in your CI pipelines. Catch performance regressions before deployment, thanks to precise and consistent metrics. Free forever for Open Source projects. 自动化 CI 流程中的性能跟踪。通过精确和一致的指标，在部署前捕捉性能回归。开源项目永久免费。

coveralls.io Display test coverage reports, free for Open Source 显示测试覆盖率报告，开源项目免费。

deepscan.io Advanced static analysis for automatically finding runtime errors in JavaScript code, free for Open Source 为自动查找 JavaScript 代码中的运行时错误提供高级静态分析，开源项目免费。

DeepSource DeepSource continuously analyzes source code changes, finding and fixing issues categorized under security, performance, anti-patterns, bug-risks, documentation, and style. Native integration with GitHub, GitLab, and Bitbucket. DeepSource 持续分析源代码更改，发现并修复归类于安全、性能、反模式、bug 风险、文档和风格的 issue。与 GitHub、GitLab 和 Bitbucket 原生集成。

DiffText Instantly find the differences between two blocks of code. Completely free to use. 立即找到两段代码之间的差异。完全免费使用。

eversql.com EverSQL - The #1 platform for database optimization. Gain critical insights into your database and SQL queries automatically. EverSQL - 数据库优化的 #1 平台。自动获得对数据库和 SQL 查询的宝贵洞察。

gerrithub.io Gerrit code review for GitHub repositories for free 免费为 GitHub 仓库提供 Gerrit 代码审查。

goreportcard.com Code Quality for Go projects, free for Open Source Go 项目的代码质量，开源项目免费。

gtmetrix.com Reports and thorough recommendations to optimize websites 提供报告和详细的优化建议以优化网站。

holistic.dev The #1 static code analyzer for Postgresql optimization. Performance, security, and architect database issues automatic detection service Postgresql 优化的 #1 静态代码分析器。性能、安全和自动检测数据库问题的架构服务。

houndci.com Comments on GitHub commits about code quality, free for Open Source 关于GitHub提交的代码质量评论，开源免费

prquorum.com ai code review github app, free 50 reviews/month on 2 repos AI 代码审查 GitHub 应用，每月免费提供 2 个仓库的 50 次审查

reviewable.io Code review for GitHub repositories, free for public or personal repos. GitHub仓库的代码审查，公共或个人仓库免费

scan.coverity.com Static code analysis for Java, C/C++, C# and JavaScript, free for Open Source Java、C/C++、C#和JavaScript的静态代码分析，开源免费

scrutinizer-ci.com Continuous inspection platform, free for Open Source 持续检查平台，开源免费

semanticdiff.com Programming language aware diff for GitHub pull requests and commits, free for public repositories 针对GitHub拉取请求和提交的编程语言感知diff，公共仓库免费

shields.io Quality metadata badges for open source projects 开源项目的质量元数据徽章

sonarcloud.io Automated source code analysis for Java, JavaScript, C/C++, C#, VB.NET, PHP, Objective-C, Swift, Python, Groovy and even more languages, free for Open Source Java、JavaScript、C/C++、C#、VB.NET、PHP、Objective-C、Swift、Python、Groovy等语言的自动化源代码分析，开源免费

tomosu.ai Scores a repository or pull request with a 0-100 Production Reliability Index, plus fix suggestions and a merge verdict. Free for one repository (public or private) through the VS Code/Cursor plugin, web scan, and GitHub App PR comments. 为存储库或拉取请求评分，提供0-100的生产可靠性指数、修复建议和合并结论。通过VS Code/Cursor插件、网页扫描和GitHub应用PR评论免费使用一个存储库（公开或私有）。

Code Search and Browsing

CodeKeep Google Keep for Code Snippets. Organize, Discover, and share code snippets, featuring a powerful code screenshot tool with preset templates and a linking feature. 代码片段的Google Keep。组织、发现和分享代码片段，具有强大的代码截图工具，预设模板和链接功能。

libraries.io Search and dependency update notifications for 32 different package managers, free for open source 针对32种不同的包管理器的搜索和依赖更新通知，开源免费

Namae Search various websites like GitHub, Gitlab, Heroku, Netlify, and many more for the availability of your project name. 在GitHub、Gitlab、Heroku、Netlify等网站搜索您的项目名称的可用性。

tickgit.com Surfaces `TODO` comments (and other markers) to identify areas of code worth returning to for improvement. 将 `TODO` 注释（和其他标记）表面化，以识别值得返回进行改进的代码区域。

CI and CD

appcircle.io An enterprise-grade mobile DevOps platform that automates the build, test, and publish store of mobile apps for faster, efficient release cycle. Free for 30 minutes max build time per build, 20 monthly builds and 1 concurrent build. 一个企业级移动DevOps平台，自动化移动应用的构建、测试和发布流程，以实现更快、更高效的发布周期。每个构建最多免费30分钟构建时间，每月20个构建和1个并发构建。

appveyor.com CD service for Windows, free for Open Source Windows的CD服务，开源项目免费。

bitrise.io A CI/CD for mobile apps, native or hybrid. With 200 free builds/month 10 min build time and two team members. OSS projects get 45 min build time, +1 concurrency and unlimited team size. 适用于移动应用的CI/CD，包括原生或混合应用。每月200个免费构建，10分钟构建时间，两名团队成员。开源项目获得45分钟构建时间，+1并发性和无限团队规模。

buddy.works A CI/CD with five free projects and one concurrent run (120 executions/month) 具有五个免费项目和一次并发运行（每月120次执行）的CI/CD。

Buildkite CI Pipelines free for 3 users and 5k job minutes/month. Test Analytics free developer tier includes 100k test executions/month, with more free inclusions for open-source projects. CI管道免费供3个用户使用，每月5k个作业分钟。测试分析免费开发者级别包括每月10万个测试执行，开源项目有更多免费内容。

bytebase.com Database CI/CD and DevOps. Free under 20 users and ten database instances 数据库CI/CD和DevOps。用户数少于20人和十个数据库实例以下免费。

CircleCI Comprehensive free plan with all features included in a hosted CI/CD service for GitHub, GitLab, and BitBucket repositories. Multiple resource classes, Docker, Windows, Mac OS, ARM executors, local runners, test splitting, Docker Layer Caching, and other advanced CI/CD features. Free for up to 6000 minutes/month execution time, unlimited collaborators, 30 parallel jobs in private projects, and up to 80,000 free build minutes for Open Source projects. 包含所有功能的全面免费计划，适用于GitHub、GitLab和BitBucket仓库的托管CI/CD服务。多个资源类别、Docker、Windows、Mac OS、ARM执行器、本地运行器、测试拆分、Docker层缓存和其他高级CI/CD功能。每月最多6000分钟执行时间免费，无限协作者，私有项目中的30个并行作业，开源项目最多80,000个免费构建分钟。

cirun.io Free for public GitHub repositories 公共GitHub仓库免费。

codemagic.io 代码魔法 Free 500 build minutes/month

deployhq.com 1 project with ten daily deployments (30 build minutes/month) 1个项目，每天10次部署（每月30分钟构建时间）

LocalOps Deploy your app on AWS/GCP/Azure in under 30 minutes. Setup standardised app environments on any cloud, which come with in-built continuous deployment automation and advanced observability. The free plan allows 1 user and 1 app environment. 在AWS/GCP/Azure上30分钟内部署您的应用程序。在任何云上设置标准化的应用程序环境，这些环境包含内置的持续部署自动化和高级可观察性。免费计划允许1个用户和1个应用程序环境。

Make The workflow automation tool lets you connect apps and automate workflows using UI. It supports many apps and the most popular APIs. Free for public GitHub repositories, and free tier with 100 Mb, 1000 Operations, and 15 minutes of minimum interval. 工作流程自动化工具让您可以通过UI连接应用程序并自动化工作流程。它支持许多应用程序和最流行的API。公共GitHub仓库免费，免费层提供100 Mb存储空间，1000次操作和15分钟的最小间隔。

Mergify workflow automation and merge queue for GitHub - Free for public GitHub repositories GitHub的工作流程自动化和合并队列 - 公共GitHub仓库免费

Nx Cloud Nx Cloud speeds up your monorepos on CI with features such as remote caching, distribution of tasks across machines and even automated splitting of your e2e test runs. It comes with a free plan for up to 30 contributors with generous 150k credits included. Nx Cloud通过远程缓存、跨机器的任务分配以及自动拆分您的端到端测试运行等功能加速您的monorepos在CI上的速度。它包含一个免费计划，最多支持30个贡献者，包括150k的信用额度。

RunMyJob Run GitHub Actions and GitLab CI pipelines smarter with real-time scaling Spike Instances. Free tier includes 400 vCPU-minutes, 800 GB-minutes, and 10 concurrent jobs with high-performance runners (12 vCPU and 32 GB RAM per job). 使用实时扩展Spike实例更智能地运行GitHub Actions和GitLab CI管道。免费层包括400 vCPU分钟，800 GB分钟和10个并发作业，每个作业具有高性能运行器（每个作业12 vCPU和32 GB RAM）。

Shipfox Run your GitHub actions 2x faster, 3.000 build minutes free each month. 使您的GitHub操作运行速度提高2倍，每月提供3,000分钟构建时间。

Spacelift Management platform for Infrastructure as Code. Free plan features: IaC collaboration, Terraform module registry, ChatOps integration, Continuous resource compliance with Open Policy Agent, SSO with SAML 2.0, and access to public worker pools: up to 200 minutes/month 基础设施即代码的管理平台。免费计划功能：IaC协作，Terraform模块注册，ChatOps集成，与Open Policy Agent的持续资源合规性，SAML 2.0单点登录，以及访问公共工作池：每月最多200分钟。

Terramate Terramate is an orchestration and management platform for Infrastructure as Code (IaC) tools such as Terraform, OpenTofu, and Terragrunt. Free up to 2 users including all features. Terramate是Terraform、OpenTofu和Terragrunt等基础设施即代码（IaC）工具的编排和管理平台。免费计划最多支持2个用户，包括所有功能。

Terrateam GitOps-first Terraform automation with pull request-driven workflows, project isolation via self-hosted runners, and layered runs for ordered operations. Free for up to 3 users. 以GitOps为先的Terraform自动化，具有通过拉取请求驱动的流程、通过自托管运行器实现的项目隔离以及分层运行以进行有序操作。最多3个用户免费。

Trigger.dev Open-source background jobs and AI agent platform with durable tasks, no timeouts, and realtime. Free plan includes $5 monthly compute credits, 20 concurrent runs, unlimited tasks, 5 team members, 10 schedules, and 1-day log retention. 开源的后台作业和AI代理平台，具有持久任务、无超时和实时功能。免费计划包括每月5美元的计算信用额度、20个并发运行、无限任务、5个团队成员、10个计划和1天日志保留。

Testing

Appetize Test your Android & iOS apps on this Cloud Based Android Phone / Tablets emulator and iPhone/iPad simulators directly in your browser. The free tier includes two concurrent session with 30 minutes of usage per month. No limit on app size. 在基于云的安卓手机/平板电脑模拟器和iPhone/iPad模拟器上直接在浏览器中测试您的安卓和iOS应用。免费层包括每月两个并发会话，每个会话30分钟的使用时间。应用大小无限制。

Argos Open Source visual testing for developers. Unlimitedprojects, with 5,000 screenshots per month. Free for open-source projects. 为开发者提供的开源视觉测试工具。无限项目，每月最多5000张截图。开源项目免费。

Bencher A continuous benchmarking tool suite to catch CI performance regressions. Free for all public projects. 用于捕获CI性能退化的持续基准测试工具套件。所有公共项目免费。

BugBug Lightweight test automation tool for web applications. It is easy to learn and doesn't require coding. You can run unlimited tests on your own computer for free. You also get cloud monitoring and CI/CD integration for an additional monthly fee. 轻量级Web应用测试自动化工具。易于学习，无需编码。您可以在自己的计算机上免费运行无限测试。此外，您还可以通过额外月费获得云监控和CI/CD集成。

checkbot.io Browser extension that tests if your website follows 50+ SEO, speed and security best practices. Free tier for smaller websites. 浏览器扩展，用于测试您的网站是否遵循50多个SEO、速度和安全最佳实践。为小型网站提供免费层。

Checkly checklyhq.com Code-first synthetic monitoring for modern DevOps. Monitor your APIs and apps at a fraction of the price of legacy providers. Powered by a Monitoring as Code workflow and Playwright. Generous free tier for devs.

CORS-Tester A free tool for developers and API testers to check if an API is CORS-enabled for a given domain and identify gaps. Get actionable insights. 开发者和API测试人员使用的免费工具，用于检查API是否为给定域名启用了CORS，并识别差距。获得可操作见解。

cypress.io Fast, easy and reliable testing for anything that runs in a browser. Cypress Test Runner is always free and open-source with no restrictions and limitations. Cypress Dashboard is free for open-source projects for up to 5 users. 为在浏览器中运行的一切提供快速、简单和可靠的测试。Cypress测试运行器始终免费且开源，无限制和限制。Cypress仪表板为开源项目免费，最多5个用户。

everystep-automation.com Records and replays all steps made in a web browser and creates scripts, free with fewer options 记录并回放浏览器中进行的所有步骤，并创建脚本，免费版功能较少

gridlastic.com Selenium Grid testing with a free plan of up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/month 提供免费计划，最多支持4个同时运行的Selenium节点/10个Grid启动/每月4,000个测试分钟进行Selenium Grid测试

katalon.com Provides a testing platform that can help teams of all sizes at different levels of testing maturity, including Katalon Studio, TestOps (+ Visual Testing free), TestCloud, and Katalon Recorder. 为不同规模和测试成熟度水平的团队提供测试平台，包括Katalon Studio、TestOps（+免费视觉测试）、TestCloud和Katalon Recorder。

Keploy Keploy is a functional testing toolkit for developers. Recording API calls generates E2E tests for APIs (KTests) and mocks or stubs(KMocks). It is free for Open Source projects. Keploy是开发者的功能测试工具包。记录API调用可生成API的端到端测试（KTests）和模拟或存根（KMocks）。开源项目免费。

Lastest Ship fast. Don't break things. AI-supported visual verification and tests you can actually trust. Free forever plan: 1 project, 500 runner-minutes/mo, 1 concurrent run, no credit card. 快速发布。不要破坏事物。AI支持的视觉验证和您真正可以信赖的测试。永久免费计划：1个项目，每月500个运行分钟，1个并发运行，无需信用卡。

loadmill.com Automatically create API and load tests by analyzing network traffic. Simulate up to 50 concurrent users for up to 60 minutes for free monthly. 通过分析网络流量自动创建API和负载测试。免费每月可模拟最多50个并发用户，持续60分钟。

lost-pixel.com holistic visual regression testing for your Storybook, Ladle, Histoire stories and Web Apps. Unlimited team members, totally free for open-source, 7,000 snapshots/month. 为您的Storybook、Ladle、Histoire故事和Web应用提供全面的视觉回归测试。无限团队成员，开源项目完全免费，每月7,000个快照。

OpenWebhook Temporary webhook URL and live inspector. No signup. Event history stays in the browser. Custom slugs and remote forwarding are paid. 临时webhook URL和实时检查器。无需注册。事件历史记录保留在浏览器中。自定义别名和远程转发为付费服务。

pagegym.com Load behaviour and page speed analysis and optimization tool. The free plan provides 10 tests per day, 5 experiments per week, and 15 GB of maximum ingested data per month. 负载行为和页面速度分析和优化工具。免费计划每天提供10次测试，每周5次实验，每月最大摄入数据15GB。

percy.io Add visual testing to any web app, static site, style guide, or component library. Unlimited team members, Demo app, and unlimited projects, 5,000 snapshots/month. 为任何Web应用、静态站点、风格指南或组件库添加视觉测试。无限团队成员，演示应用和无限制项目，每月5,000个快照。

qase.io Test management system for Dev and QA teams. Manage test cases, compose test runs, perform tests, track defects, and measure impact. The free tier includes all core features, with 500MB available for attachments and up to 3 users. 适用于开发和QA团队的测试管理系统。管理测试用例、编写测试运行、执行测试、跟踪缺陷和衡量影响。免费层包含所有核心功能，附件500MB，最多3个用户。

Repeato No-code mobile app test automation tool built on top of computer vision and AI. Works for native apps, flutter, react-native, web, ionic, and many more app frameworks. The free plan is limited to 10 tests for iOS and 10 for Android, but includes most of the features of the paid plans, including unlimited test runs. 基于计算机视觉和AI的无代码移动应用测试自动化工具。适用于原生应用、flutter、react-native、web、ionic以及许多其他应用框架。免费计划对iOS和Android的限制为10次测试，但包括付费计划的大部分功能，包括无限次测试运行。

Requestly Open-source Chrome Extension to Intercept, Redirect and Mock HTTP Requests. Featuring Debugger, Mock Server, API Client and Session Recording. Redirect URLs, Modify HTTP Headers, Mock APIs, Inject custom JS, Modify GraphQL Requests, Generate Mock API Endpoints, Record session with Network & Console Logs. Create upto 10 rules in Free Tier. Free for open-source. 开源的Chrome扩展，用于拦截、重定向和模拟HTTP请求。功能包括调试器、模拟服务器、API客户端和会话录制。重定向URL、修改HTTP头、模拟API、注入自定义JS、修改GraphQL请求、生成模拟API端点、记录带有网络和控制台日志的会话。免费层可创建多达10条规则。开源免费。

Sample Files 示例文件 Collection of free test files across video, audio, document and archive formats, useful for testing and QA. 包含视频、音频、文档和存档格式的免费测试文件集合，适用于测试和质量保证。

seotest.me Free on-page SEO website tester. 10 free website crawls per day. Useful SEO learning resources and recommendations on how to improve the on-page SEO results for any website regardless of technology. 免费的页面SEO网站测试工具。每天免费爬取10个网站。提供有用的SEO学习资源和关于如何改进任何网站（无论技术如何）的页面SEO结果的建议。

Sherlo Visual regression testing for React Native apps. Free plan: 1,000 snapshots/month, iOS & Android simulators. React Native应用的视觉回归测试。免费计划：每月1000个快照，iOS和Android模拟器。

snippets.uilicious.com It's like CodePen but for cross-browser testing. UI-licious lets you write tests like user stories and offers a free platform - UI-licious Snippets - that allows you to run unlimited tests on Chrome with no sign-up required for up to 3 minutes per test run. Found a bug? You can copy the unique URL to your test to show your devs exactly how to reproduce the bug. 类似于CodePen，但用于跨浏览器测试。UI-licious允许您编写类似用户故事的测试，并提供一个免费平台——UI-licious Snippets，允许您在Chrome上运行无限次测试，无需注册，每次测试运行最多3分钟。发现bug了吗？您可以将测试的唯一URL复制到您的测试中，以便向您的开发者展示如何重现bug。

SSR (Server-side Rendering) Checker Check SSR (server-side rendering) for any URL by visually comparing the server rendered version of the page with the regular version. 通过视觉比较页面在服务器上的渲染版本和常规版本来检查任何URL的SSR（服务器端渲染）。

testingbot.com Selenium Browser and Device Testing, free for Open Source Selenium浏览器和设备测试，开源免费。

Testspace.com A Dashboard for publishing automated test results and a Framework for implementing manual tests as code using GitHub. The service is free for Open Source and accounts for 450 monthly results. 发布自动化测试结果的仪表板和将手动测试作为代码实现的框架，使用GitHub。服务对开源免费，每月可处理450个结果。

tesults.com Test results reporting and test case management. Integrates with popular test frameworks. Open Source software developers, individuals, educators, and small teams getting started can request discounted and free offerings beyond basic free projects. 测试结果报告和测试用例管理。与流行的测试框架集成。开源软件开发者、个人、教育者和小型团队在开始时可以请求折扣和免费提供的基本免费项目之外的折扣和免费服务。

UseWebhook.com Capture and inspect webhooks from your browser. Forward to localhost, or replay from history. Free to use. 从您的浏览器捕获和检查webhooks。转发到localhost，或从历史记录中回放。免费使用。

Vaadin Build scalable UIs in Java or TypeScript, and use the integrated tooling, components, and design system to iterate faster, design better, and simplify the development process. Unlimited Projects with five years of free maintenance. 使用Java或TypeScript构建可扩展的UI，并使用集成的工具、组件和设计系统来加快迭代速度、设计更好的UI并简化开发过程。提供五年免费维护的无限项目。

VibeView Browser-based iOS, Android, Apple TV and Android TV simulators with AI-powered test automation from a recorded flow or plain-language instructions. Free tier includes two concurrent sessions and 30 minutes of streaming per month. Bringing your own API key bypasses the included AI usage credit. 基于浏览器的iOS、Android、Apple TV和Android TV模拟器，具有从录制流程或普通语言说明中自动化的AI测试功能。免费层包括每月两个并发会话和30分钟的流媒体播放时间。使用自己的API密钥可以绕过包含的AI使用信用额。

webhook.site Verify webhooks, outbound HTTP requests, or emails with a custom URL. A temporary URL and email address are always free. 使用自定义URL验证webhooks、出站HTTP请求或电子邮件。临时URL和电子邮件地址始终免费。

websitepulse.com Various free network and server tools. 提供各种免费的网络和服务器工具。

kogiQA A web UI automation tool that functions without the need for selectors. Every developer gets 500 actions per month for free. 一个无需选择器的Web UI自动化工具。每位开发者每月免费获得500个操作。

Security and PKI

aikido.dev All-in-one appsec platform covering SCA, SAST, CSPM, DAST, Secrets, IaC, Malware, Container scanning, EOL,... Free plan includes two users, scanning of 10 repos, 1 cloud, 2 containers & 1 domain. 涵盖SCA、SAST、CSPM、DAST、密钥、IaC、恶意软件、容器扫描、EOL等一站式应用安全平台。免费计划包括两个用户、扫描10个仓库、1个云、2个容器和1个域名。

CertKit Manage SSL Certificate issuance, renewal, and monitoring. Search the Certificate Transparency Logs. Free for 3 certificates and 1 user after the beta. 管理SSL证书的发行、续订和监控。搜索证书透明度日志。免费版支持3个证书和1个用户（测试版后）。

CertObserver CT Search Find public SSL/TLS certificates recorded in Certificate Transparency logs. CT search is free but CT monitoring is not. 查找记录在证书透明度日志中的公共SSL/TLS证书。CT搜索免费，但CT监控不是。

CertPost Live SSL/TLS certificate monitoring on port 443 or custom ports (SMTP/IMAP). Reads the served certificate on the wire, full chain verification, and alerts via email or webhook before expiration. Free tier includes 3 certificates monitored forever. 在443端口或自定义端口（SMTP/IMAP）上实时监控SSL/TLS证书。读取传输中的服务证书，完整链路验证，并在过期前通过电子邮件或webhook发送警报。免费层包括永久监控3个证书。

Corgea Free autonomous security platform that finds, validates and fixes insecure code and packages across +20 languages and frameworks. Free plan includes 1 user and 2 repos. 免费的自主安全平台，可发现、验证和修复20多种语言和框架中的不安全代码和包。免费计划包括1个用户和2个仓库。

crypteron.com Cloud-first, developer-friendly security platform prevents data breaches in .NET and Java applications 以云为先、开发者友好的安全平台，防止.NET和Java应用程序中的数据泄露。

CyberChef A simple, intuitive web app for analyzing and decoding/encoding data without dealing with complex tools or programming languages. Like a Swiss army knife of cryptography & encryption. All features are free to use, with no limit. Open source if you wish to self-host. 一个简单直观的Web应用程序，用于分析和解码/编码数据，无需处理复杂工具或编程语言。就像瑞士军刀一样的加密与加密工具。所有功能均可免费使用，无限制。如果您想自行托管，它是开源的。

Datree Open Source CLI tool to prevent Kubernetes misconfigurations by ensuring that manifests and Helm charts follow best practices as well as your organization’s policies 一个开源的CLI工具，通过确保清单和Helm图表遵循最佳实践以及您组织的策略来防止Kubernetes配置错误。

Dependabot Automated dependency updates for Ruby, JavaScript, Python, PHP, Elixir, Rust, Java (Maven and Gradle), .NET, Go, Elm, Docker, Terraform, Git Submodules, and GitHub Actions. 为Ruby、JavaScript、Python、PHP、Elixir、Rust、Java（Maven和Gradle）、.NET、Go、Elm、Docker、Terraform、Git Submodules和GitHub Actions提供自动依赖项更新。

DJ Checkup Scan your Django site for security flaws with this free, automated checkup tool. Forked from the Pony Checkup site. 使用这个免费的自动化检查工具扫描您的Django站点以查找安全漏洞。由Pony Checkup站点分支而来。

Doppler Universal Secrets Manager for application secrets and config, with support for syncing to various cloud providers. Free for five users with basic access controls. 适用于应用程序秘密和配置的通用秘密管理器，支持同步到各种云提供商。对于五个用户的基本访问控制免费。

Dotenv Sync your .env files, quickly & securely. Stop sharing your .env files over insecure channels like Slack and email, and never lose an important .env file again. Free for up to 3 teammates. 快速安全地同步您的.env文件。停止通过像Slack和电子邮件这样的不安全渠道共享您的.env文件，并且永远不再丢失重要的.env文件。最多为3名队友免费。

GitGuardian Keep secrets out of your source code with automated secrets detection and remediation. Scan your git repos for 350+ types of secrets and sensitive files - Free for individuals and teams of 25 developers or less. 通过自动的秘密检测和补救，将秘密从源代码中排除。扫描您的git仓库以查找350多种类型的秘密和敏感文件——个人和25名开发者或以下团队的免费服务。

HasMySecretLeaked Search across 20 million exposed secrets in public GitHub repositories, gists, issues,and comments for Free 免费搜索公共GitHub存储库、gists、问题和评论中的2000万个泄露的秘密。

Have I been pwned? REST API for fetching the information on the breaches. 用于获取泄露信息的REST API。

HimitsuShell A shell script DRM compiler that converts shell scripts into obfuscated binaries using an embedded shell interpreter and anti-debugging (alternative to shc). Free unlimited web edition. 一个将shell脚本转换为混淆二进制的shell脚本DRM编译器，使用嵌入式shell解释器和反调试（shc的替代品）。免费无限网络版。

hostedscan.com Online vulnerability scanner for web applications, servers, and networks. Ten free scans per month. 在线漏洞扫描器，适用于Web应用程序、服务器和网络。每月提供10次免费扫描。

Infisical Open source platform that lets you manage developer secrets across your team and infrastructure: everywhere from local development to staging/production 3rd-party services. Free for up to 5 developers. 开源平台，让您管理团队和基础设施中的开发者秘密：从本地开发到预发布/生产第三方服务。最多5名开发者免费使用。

inspect.software Public record of automated open-source repository audits: security posture, maintainability, dependency health, and malicious-package checks, with a versioned methodology and grade badges. Free tier: full access to all published reports, automatic coverage of repositories above the public-interest threshold (≥500 stars, ≥50 forks, or org-owned with ≥250 stars), embeddable badges, and 100 starting credits (5 inspections) for below-threshold repositories. 自动化开源代码库审计的公共记录：安全态势、可维护性、依赖健康和恶意软件包检查，采用版本化方法和评级徽章。免费层：对所有已发布报告的完全访问权限，自动覆盖超过公共利益阈值的代码库（≥500个星标，≥50个分叉，或组织拥有的且≥250个星标的代码库），可嵌入的徽章，以及低于阈值的代码库的100个起始积分（5次检查）。

Internet.nl Test for modern Internet Standards like IPv6, DNSSEC, HTTPS, DMARC, STARTTLS and DANE 测试现代互联网标准，如IPv6、DNSSEC、HTTPS、DMARC、STARTTLS和DANE。

IntoDNS.ai DNS and email security analyzer that checks SPF, DKIM, DMARC, DNSSEC, BIMI, MTA-STS, and 40+ blacklists with AI-powered explanations and fix suggestions. 100% free, no signup required. DNS和电子邮件安全分析器，检查SPF、DKIM、DMARC、DNSSEC、BIMI、MTA-STS以及40多个黑名单，提供AI驱动的解释和修复建议。100%免费，无需注册。

letsencrypt.org Free SSL Certificate Authority with certs trusted by all major browsers 免费SSL证书颁发机构，其证书被所有主要浏览器信任。

meterian.io Monitor Java, Javascript, .NET, Scala, Ruby, and NodeJS projects for security vulnerabilities in dependencies. Free for one private project, unlimited projects for open source. 监控Java、JavaScript、.NET、Scala、Ruby和NodeJS项目中的依赖项安全漏洞。一个私有项目免费，开源项目无限量。

Mozilla Observatory Find and fix security vulnerabilities in your site. 查找并修复您网站中的安全漏洞。

Otterwatch Daily SSL/TLS certificate monitoring: expiry alerts (30/7/1 day), chain and OCSP revocation checks, and certificate transparency issuance history. Free forever for 5 domains, no credit card. 每日SSL/TLS证书监控：到期警报（30/7/1天）、链和OCSP吊销检查以及证书透明度发行历史。免费提供5个域名，无需信用卡。

Protectumus Free website security check, site antivirus, and server firewall (WAF) for PHP. Email notifications for registered users in the free tier. 免费网站安全检查、网站防病毒和服务器防火墙（WAF）用于PHP。免费层注册用户将收到电子邮件通知。

Public Cloud Threat Intelligence High confidence Indicator of Compromise(IOC) targeting public cloud infrastructure, A portion is available on github (https://github.com/unknownhad/AWSAttacks). Full list is available via API 针对公共云基础设施的高置信度入侵指标（IOC）。部分内容可在github上找到（https://github.com/unknownhad/AWSAttacks）。完整列表可通过API获取。

pyup.io Monitor Python dependencies for security vulnerabilities and update them automatically. Free for one private project, unlimited projects for open source. 监控 Python 依赖中的安全漏洞并自动更新。1 个私有项目免费，开源项目无限。

qualys.com Find web app vulnerabilities, audit for OWASP Risks 查找 Web 应用漏洞，审计 OWASP 风险。

SikkerKey 西克凯 Machine authenticated secrets manager, includes 2 projects, 2 bootstrapped machines, 20 secrets and 7 days audit log retention for free. 机器鉴权的密钥管理器，免费含 2 个项目、2 台引导机器、20 个密钥及 7 天审计日志保留。

Smart Grow Vault 智能种植库 Secure Enterprise-grade platform for managing environment variables and secrets. Free tier includes up to 3 applications and 150 secrets per project. 企业级安全平台，用于管理环境变量与密钥。免费套餐含最多 3 个应用与每项目 150 个密钥。

Socket 插座 Free supply chain security for individual developers, small teams, and open source projects. Includes a free app and firewall CLI tool to protect your code from vulnerable and malicious dependencies. Detects 70+ indicators of supply chain risk. 面向个人开发者、小团队与开源项目的免费供应链安全。含免费应用与防火墙 CLI 工具，保护你的代码免受脆弱与恶意依赖侵害。可检测 70+ 项供应链风险指标。

ssllabs.com Intense analysis of the configuration of any SSL web server 对任意 SSL Web 服务器的配置进行深度分析。

Sucuri SiteCheck Sucuri 站点检查 Free website security check and malware scanner 免费网站安全检查与恶意软件扫描。

TestTLS.com 测试TLS.com Test an SSL/TLS service for secure server configuration, certificates, chains, etc. Not limited to HTTPS. 测试 SSL/TLS 服务的服务端安全配置、证书、证书链等。不限于 HTTPS。

Virgil Security 维吉尔安全 Tools and services for implementing end-to-end encryption, database protection, IoT security, and more in your digital solution. Free for applications with up to 250 users. 在你的数字化解决方案中实现端到端加密、数据库保护、IoT 安全等的工具与服务。最多 250 用户的应用免费。

semgrep Scan code for security issues and vulnerable dependencies with SAST and SCA. Free tier includes up to 10 contributors and 10 private repos (unlimited public repos). 使用SAST和SCA扫描代码以发现安全问题和易受攻击的依赖项。免费层包括最多10个贡献者和10个私有仓库（公共仓库无限）。

SnapEnv Secure environment variable manager for dev teams. AES-256-GCM encryption at rest, CLI, Kubernetes operator, and audit log. Free plan includes 3 projects, 3 members, and 3 environments per project, forever. 为开发团队提供的加密环境变量管理器。静态存储时使用AES-256-GCM加密，支持CLI、Kubernetes操作符和审计日志。免费计划包括3个项目、3名成员和每个项目3个环境，永久有效。

Authentication, Authorization, and User Management

360username 360用户名 A free tool to search a username across 90+ social platforms to find matching profiles. 免费工具，在 90+ 社交平台上搜索用户名以查找匹配档案。

Aserto 阿塞托 Fine-grained authorization as a service for applications and APIs. Free up to 1000 MAUs and 100 authorizer instances. 面向应用与 API 的细粒度授权即服务。最多 1000 MAU（月活用户）与 100 个授权器实例免费。

asgardeo.io 阿斯加德奥 Seamless Integration of SSO, MFA, passwordless auth and more. Includes SDKs for frontend and backend apps. Free up to 1000 MAUs and five identity providers. 无缝集成 SSO、MFA、无密码认证等。含前端与后端应用 SDK。最多 1000 MAU 与 5 个身份提供商免费。

Auth0 授权0 Hosted SSO. The free plan includes 25,000 MAUs, unlimited Social Connections, a custom domain, and more. 托管式 SSO。免费套餐含 2.5 万 MAU、无限社交连接、自定义域名等。

Authgear Bring Passwordless, OTPs, 2FA, SSO to your apps in minutes. All Front-end included. Free up to 5000 MAUs. 数分钟内为你的应用带来无密码、OTP、2FA、SSO。前端全部包含。最多 5000 MAU 免费。

Authress 作者 Authentication login and access control, unlimited identity providers for any project. Facebook, Google, Twitter and more. The first 1000 API calls are free. 认证登录与访问控制，任意项目无限身份提供商。Facebook、Google、Twitter 等。前 1000 次 API 调用免费。

Authy 奥蒂 Two-factor authentication (2FA) on multiple devices, with backups. Drop-in replacement for Google Authenticator. Free for up to 100 successful authentications. 多设备的双因素认证（2FA），含备份。Google Authenticator 的即插即用替代品。最多 100 次成功认证免费。

Cerbos Hub 赛波斯枢纽 A complete authorization management system for authoring, testing, and deploying access policies. Fine-grained authorization and access control, free up to 100 monthly active principals. 一套完整的授权管理系统，用于编写、测试与部署访问策略。细粒度授权与访问控制，每月最多 100 个活跃主体（principals）免费。

Clerk 文员 User management, authentication, 2FA/MFA, prebuilt UI components for sign-in, sign-up, user profiles, and more. Free plan includes unlimited applications, 50,000 MRU limit per app, 3 dashboard seats, and more. 用户管理、认证、2FA/MFA，以及用于登录、注册、用户资料等的预构建 UI 组件。免费套餐含无限应用、每应用 5 万 MRU（月相关活跃用户）上限、3 个仪表盘席位等。

Cloud-IAM 云IAM Keycloak Identity and Access Management as a Service. Free up to 100 users and one realm. Keycloak 身份与访问管理即服务。最多 100 名用户与一个 realm 免费。

Descope 德斯科普 Highly customizable AuthN flows, has both a no-code and API/SDK approach, Free 7,500 active users/month, 50 tenants (up to 5 SAML/SSO tenants). 高度可定制的认证（AuthN）流程，提供无代码与 API/SDK 两种方案。每月 7500 活跃用户、50 个租户（最多 5 个 SAML/SSO 租户）免费。

duo.com Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens. 面向网站或应用的双因素认证（2FA）。10 名用户、全认证方式、无限集成、硬件令牌均免费。

Kinde 金德 Simple, robust authentication you can integrate with your product in minutes. Everything you need to get started with 7,500 free MAU. 简单、稳健的认证，数分钟内即可集成到你的产品。起步所需一应俱全，7500 免费 MAU。

logintc.com 登录网 Two-factor authentication (2FA) by push notifications, free for ten users, VPN, Websites, and SSH 通过推送通知实现的双因素认证（2FA），10 名用户、VPN、网站与 SSH 免费。

Logto 洛格托 Develop, secure, and manage user identities of your product - for both authentication and authorization. Free for up to 5,000 MAUs with open-source self-hosted option available. 开发、保护并管理产品用户身份——认证与授权兼具。最多 5000 MAU 免费，提供开源自托管选项。

MojoAuth MojoAuth makes it easy to implement Passwordless authentication on your web, mobile, or any application in minutes. MojoAuth 让你几分钟内即可在 Web、移动或任意应用上轻松实现无密码认证。

Okta 奥克塔 User management, authentication and authorization. Free for up to 100 monthly active users. 用户管理、认证与授权。最多 100 名月活用户免费。

Ory 奥里 AuthN/AuthZ/OAuth2.0/Zero Trust managed security platform. Forever free developer accounts with all security features, unlimited team members, 200 daily active users, and 25k/mo permission checks. AuthN/AuthZ/OAuth2.0/零信任托管安全平台。永久免费的开发者账号含全部安全特性、无限团队成员、每日 200 活跃用户、每月 2.5 万次权限检查。

Permit.io 许可.io Auhtorization-as-a-service provider platform enabling RBAC, ABAC, and ReBAC for scalable microservices with real-time updates and a no-code policy UI. A 1000 Monthly Active User free tier. 授权即服务提供商平台，为可扩展微服务提供 RBAC、ABAC 与 ReBAC，支持实时更新与无代码策略 UI。1000 月活用户免费套餐。

Phase Two 第二阶段 Keycloak Open Source Identity and Access Management. Free realm up to 1000 users, up to 10 SSO connections, leveraging Phase Two's Keycloak enhanced container which includes the Organization extension. Keycloak 开源身份与访问管理。最多 1000 用户、最多 10 个 SSO 连接免费 realm，基于 Phase Two 增强容器（含 Organization 扩展）。

PropelAuth 推进认证 A Sell to companies of any size immediately with a few lines of code, free up to 200 users and 10k Transactional Emails (with a watermark branding: "Powered by PropelAuth"). 数行代码即可立即向任意规模的公司销售。最多 200 用户与 1 万封事务邮件免费（带 "Powered by PropelAuth" 水印品牌）。

Scalekit 秤套件 Enterprise SSO (SAML, OIDC), SCIM provisioning, and social logins for B2B SaaS. Free tier includes 1 million MAU, 100 organizations, 1 SSO connection, and 1 SCIM connection. 面向 B2B SaaS 的企业级 SSO（SAML、OIDC）、SCIM 配置与社交登录。免费套餐含 100 万 MAU、100 个组织、1 个 SSO 连接与 1 个 SCIM 连接。

Stack Auth 堆栈认证 Open-source authentication that doesn't suck. The most developer-friendly solution, getting you started in just five minutes. Self-hostable for free, or offers a managed SaaS version with 10k free Monthly Active Users. 不糟糕的开源认证。最对开发者友好的方案，5 分钟即可起步。可免费自托管，或提供托管 SaaS 版含 1 万免费月活用户。

Stytch 斯蒂奇 An all-in-one platform that provides APIs and SDKs for authentication and fraud prevention. The free plan includes 10,000 monthly active users, unlimited organizations, 5 SSO or SCIM connections, and 1,000 M2M tokens. 一体化平台，提供认证与防欺诈的 API 与 SDK。免费套餐含 1 万月活用户、无限组织、5 个 SSO 或 SCIM 连接、1000 个 M2M 令牌。

SuperTokens 超级代币 Open source user authentication that natively integrates into your app - enabling you to get started quickly while controlling the user and developer experience. Free for up to 5000 MAUs. 原生集成到你应用的开源用户认证，让你快速起步并掌控用户与开发者体验。最多 5000 MAU 免费。

Unkey Open-source API key management and rate-limiting platform. Free for up to 100,000 requests per month and 100 active API keys, with full access to key creation, revocation, and rate-limiting capabilities. 开源的API密钥管理和速率限制平台。每月最多100,000次请求和100个活跃的API密钥免费，并提供完整的密钥创建、撤销和速率限制功能。

WorkOS 工作操作系统 Free user management and authentication for up to 1 Million MAUs. Support email + password, social auth, Magic Auth, MFA, and more. 最多 100 万 MAU 的免费用户管理与认证。支持邮箱+密码、社交认证、Magic Auth、MFA 等。

ZITADEL Cloud ZITADEL云 A turnkey user and access management that works for you and supports multi-tenant (B2B) use cases. Free for up to 25,000 authenticated requests, with all security features (no paywall for OTP, Passwordless, Policies, and so on). 开箱即用的用户与访问管理，支持多租户（B2B）场景。最多 2.5 万次认证请求免费，含全部安全特性（OTP、无密码、策略等无付费墙）。

Mobile App Distribution and Feedback

Appho.st 应用程序 Mobile app hosting platform. The free plan includes five apps, 50 monthly downloads, and a maximum file size of 100 MB. 移动应用托管平台。免费套餐含 5 个应用、每月 50 次下载、最大 100MB 文件。

Diawi 迪亚维 Deploy iOS & Android apps directly to devices. Free plan: app uploads, password-protected links, 1-day expiration, ten installations. 直接将 iOS 与 Android 应用部署到设备。免费套餐：应用上传、密码保护链接、1 天有效期、10 次安装。

GetUpdraft 获取上升气流 Distribute mobile apps for testing. The free plan includes one app project, three app versions, 500 MB storage, and 100 app installations per month. 分发移动应用供测试。免费套餐含 1 个应用项目、3 个应用版本、500MB 存储、每月 100 次应用安装。

InstallOnAir 安装直播 Distribute iOS & Android apps over the air. Free plan: unlimited uploads, private links, 2-day expiration for guests, 60 days for registered users. 空中分发 iOS 与 Android 应用。免费套餐：无限上传、私有链接、访客 2 天有效期、注册用户 60 天。

Loadly 负载很大 iOS & Android beta apps distribution service offers completely free services with unlimited downloads, high-speed downloads, and unlimited uploads. iOS 与 Android 测试版应用分发服务，完全免费，无限下载、高速下载、无限上传。

DistApp 分布式应用程序 Manage and distribute Android, iOS and Desktop apps. Useful for tester or self distribution. Try it for free with 2 apps, 1 org, 100 MB storage with unlimited downloads, or self-hosted your self. 管理与分发 Android、iOS 与桌面应用。适用于测试者或自助分发。免费试用：2 个应用、1 个组织、100MB 存储、无限下载，或自行自托管。

Management System

bitnami.com 比特纳米网 Deploy prepared apps on IaaS. Management of 1 AWS micro instance free 在 IaaS 上部署预置应用。1 个 AWS 微实例免费管理。

Esper 埃斯珀 MDM and MAM for Android Devices with DevOps. One hundred devices free with one user license and 25 MB Application Storage. 面向 Android 设备、带 DevOps 的 MDM（移动设备管理）与 MAM（移动应用管理）。100 台设备免费，含 1 个用户许可与 25MB 应用存储。

jamf.com Device management for iPads, iPhones, and Macs, three devices free 面向 iPad、iPhone 与 Mac 的设备管理，3 台设备免费。

Miradore 米拉多尔 Device Management service. Stay up-to-date with your device fleet and secure unlimited devices for free. The free plan offers basic features. 设备管理服务。随时掌握你的设备群并及时更新，无限设备免费保护。免费套餐提供基础特性。

ploi.io Server management tool to easily manage and deploy your servers & sites. Free for one server. 服务器管理工具，轻松管理与部署你的服务器与站点。1 台服务器免费。

runcloud.io 跑云网 Server management focusing mainly on PHP projects. Free for up to 1 server. 主要面向 PHP 项目的服务器管理。最多 1 台服务器免费。

serveravatar.com Manage and monitor PHP-based web servers with automated configurations. Free for one server. 通过自动化配置管理与监控基于 PHP 的 Web 服务器。1 台服务器免费。

xcloud.host 云主机 Server management and deployment platform with a user-friendly interface. Free tier available for one server. 界面友好的服务器管理与部署平台。1 台服务器可用免费套餐。

Messaging and Streaming

Ably 阿布利 Realtime messaging service with presence, persistence and guaranteed delivery. The free plan includes 3m messages per month, 100 peak connections, and 100 peak channels. 带在线状态、持久化与可靠投递的实时消息服务。免费套餐含每月 300 万条消息、100 个峰值连接、100 个峰值频道。

cloudamqp.com 云网 RabbitMQ as a Service. Little Lemur plan: max 1 million messages/month, max 20 concurrent connections, max 100 queues, max 10,000 queued messages, multiple nodes in different AZ's RabbitMQ 即服务。Little Lemur 套餐：最多每月 100 万条消息、最多 20 个并发连接、最多 100 个队列、最多 1 万条排队消息，跨不同可用区的多节点。

courier.com 快递网 Single API for push, in-app, email, chat, SMS, and other messaging channels with template management and other features. The free plan includes 10,000 messages/mo. 单一 API 覆盖推送、应用内、邮件、聊天、短信等消息渠道，含模板管理等功能。免费套餐含每月 1 万条消息。

EMQX Serverless EMQX 无服务器 Scalable and secure serverless MQTT broker you can get in seconds. 1M session minutes/month free forever (no credit card required). 可秒级获取、可扩展且安全的无服务器 MQTT 代理。每月 100 万会话分钟永久免费（无需信用卡）。

Engage 从事 All-in-one Customer Engagement and Automation Tool (email, push, SMS, product tours, banners and more) for SaaS. Free for up to 1,000 active users per month. 面向 SaaS 的一体化客户参与与自动化工具（邮件、推送、短信、产品导览、横幅等）。每月最多 1000 活跃用户免费。

engagespot.co 参与点co Multi-channel notification infrastructure for developers with a prebuilt in-app inbox and no-code template editor. Free plan includes 10,000 messages/mo. 面向开发者的多通道通知基础设施，含预构建应用内收件箱与无代码模板编辑器。免费套餐含每月 1 万条消息。

HiveMQ Connect your MQTT devices to the Cloud Native IoT Messaging Broker. Free to connect up to 100 devices (no credit card required) forever. 将你的 MQTT 设备连接到 Cloud Native IoT 消息代理。永久免费连接最多 100 台设备（无需信用卡）。

httpSMS http短信 Send and receive text messages using your Android phone as an SMS Gateway. Free to send and receive up to 200 messages per month. 用你的 Android 手机作为短信网关收发短信。每月最多 200 条消息收发免费。

knock.app 敲门应用程序 Notifications infrastructure for developers. Send to multiple channels like in-app, email, SMS, Slack, and push with a single API call. The free plan includes 10,000 messages/mo. 面向开发者的通知基础设施。通过单次 API 调用发送到应用内、邮件、短信、Slack 与推送等多通道。免费套餐含每月 1 万条消息。

Novu.co The open-source notification infrastructure for developers. Simple components and APIs for managing all communication channels in one place: Email, SMS, Direct, In-App and Push. The free plan includes 30,000 notifications/month with 90 days of retention. 面向开发者的开源通知基础设施。用简单组件与 API 在一个地方管理所有通信渠道：邮件、短信、站内、应用内与推送。免费套餐含每月 3 万条通知、90 天保留。

Pingram.io Communication infrastructure in 5 minutes. Free tier includes: 100 SMS and calls, 3000 Emails, Push, Slack, MS Teams, WhatsApp, and more. 5 分钟搭建通信基础设施。免费套餐含：100 条短信与通话、3000 封邮件、推送、Slack、MS Teams、WhatsApp 等。

Pocket Alert 袖珍警报 Send push notifications to your iOS and Android devices. Effortlessly integrate via API or Webhooks and maintain full control over your alerts. Free plan: 50 messages per day to 1 device and 1 application. 向你的 iOS 与 Android 设备发送推送通知。通过 API 或 Webhooks 轻松集成，完全掌控你的告警。免费套餐：每天 50 条消息到 1 台设备与 1 个应用。

pubnub.com Swift, Kotlin, and React messaging at 1 million transactions each month. Transactions may contain multiple messages.

pusher.com Pusher.com Realtime messaging service. Free for up to 100 simultaneous connections and 200,000 messages/day 实时消息服务。最多 100 个同时连接、每天 20 万条消息免费。

scaledrone.com Realtime messaging service. Free for up to 20 simultaneous connections and 100,000 events/day 实时消息服务。最多 20 个同时连接、每天 10 万次事件免费。

SMSGate 短信门 SMS Gateway for Android™ enables sending and receiving SMS messages through your devices using cloud routing. Completely free cloud service (with recommended notification for usage above 10,000 messages/day to maintain quality for all users). 面向 Android™ 的短信网关，通过云路由用你的设备收发短信。完全免费的云服务（建议日用量超 1 万条时开启通知以维系所有用户的服务质量）。

SuprSend 超级发送 SuprSend is a notification infrastructure that streamlines your product notifications with an API-first approach. Create and deliver transactional, crons, and engagement notifications on multiple channels with a single notification API. In free plan you get 10,000 notifications per month, including different workflow nodes such as digests, batches, multi-channels, preferences, tenants, broadcasts and more. SuprSend 是采用 API 优先方式精简产品通知的通知基础设施。用单一通知 API 在多渠道创建并投递事务、定时与参与类通知。免费套餐每月 1 万条通知，含摘要、批处理、多渠道、偏好、租户、广播等不同工作流节点。

synadia.com NATS.io as a service. Global, AWS, GCP, and Azure. Free forever with 4k msg size, 50 active connections, and 5GB of data per month. NATS.io 即服务。覆盖全球、AWS、GCP 与 Azure。永久免费含 4k 消息大小、50 个活跃连接、每月 5GB 数据。

webpushr 网络推送 Web Push Notifications - Free for upto 10k subscribers, unlimited push notifications, in-browser messaging Web 推送通知——最多 1 万订阅者免费，无限推送通知、浏览器内消息。

vask 瓦斯克 Realtime messaging service, Pusher-compatible. Dev tier is limited to local development only and free with 100 concurrent connections, 1,000,000 broadcasts/month, unlimited client events, 32kb message size. 实时消息服务，兼容 Pusher。开发层仅限本地开发，免费含 100 个并发连接、每月 100 万次广播、无限客户端事件、32KB 消息大小。

Log Management

bugfender.com Free up to 100k log lines/day with 24 hours retention 每天最多 10 万行日志，保留 24 小时免费。

log.dog 日志狗 LogDog is a remote debugging/logging SDK (iOS and Android) with a web ui. Captures all logs, requests and events in real-time and allows to intercept them. Free for up to 100MB of logs every month LogDog 是远程调试/日志 SDK（iOS 与 Android），配 Web UI。实时捕获所有日志、请求与事件并允许拦截。每月最多 100MB 日志免费。

logflare.app Free for up to 12,960,000 entries per app per month, 3 days retention 每应用每月最多 1296 万条条目、保留 3 天免费。

logtail.com 日志尾网 ClickHouse-based SQL-compatible log management. Free up to 1 GB per month, three days retention. 基于 ClickHouse、兼容 SQL 的日志管理。每月最多 1GB、保留 3 天免费。

logzab.com Audit trail management system. Free 1,000 user activity logs per month, 1-month retention, for up to 5 projects. 审计追踪管理系统。每月 1000 条用户活动日志、保留 1 个月、最多 5 个项目免费。

ManageEngine Log360 Cloud ManageEngine Log360云 Log Management service powered by Manage Engine. Free Plan offers 50 GB storage with 15 days Storage Retention and 7 days search. 由 ManageEngine 提供支持的日志管理服务。免费套餐提供 50GB 存储、15 天存储保留与 7 天搜索。

openobserve.ai 开放观察.ai 200 GB Ingestion/month free, 15 Days Retention 每月 200GB 摄入免费，保留 15 天。

Smart Grow Logs 智能种植日志 Centralized log management platform with end-to-end encryption, real-time alerts, and multi-platform SDKs. Free tier includes up to 3.000 logs per day. 端到端加密、实时告警与多平台 SDK 的集中式日志管理平台。免费套餐含每天最多 3000 条日志。

Translation Management

AutoLocalise.com Instantly localize without managing translation files. Free for up to 10,000 characters/month, unlimited languages. 无需管理翻译文件即可即时本地化。每月最多 1 万字符、无限语言免费。

crowdin.com 人群网站 Unlimited projects, unlimited strings, and collaborators for Open Source 开源项目无限项目、无限字符串与协作者。

Free PO editor 免费 PO 编辑器 Free for everybody 对所有人免费。

Lingo.dev Open-source AI-powered CLI for web & mobile localization. Bring your own LLM, or use 10,000 free words every month via Lingo.dev-managed localization engine. 面向 Web 与移动端本地化的开源 AI 驱动 CLI。自带 LLM，或通过 Lingo.dev 托管本地化引擎每月免费使用 1 万词。

lingohub.com Free up to 3 users, always free for Open Source 最多 3 名用户免费，开源永久免费。

Localhero.ai 本地英雄.ai Automatic on-brand translations on every pull request, with glossary and translation memory. Free for 1 project, 250 translation credits/month (~4,000 words). 在每个 PR 上自动完成符合品牌调性的翻译，含术语表与翻译记忆。1 个项目、每月 250 翻译额度（约 4000 词）免费。

localazy.com 本地化网站 Free for 1000 source language strings, unlimited languages, unlimited contributors, startup and open source deals 1000 条源语言字符串免费，无限语言、无限贡献者，面向创业与开源有优惠。

Localit 本地化 Fast, developer-friendly localization platform with seamless and free GitHub/GitLab integration, AI-assisted and manual translations, and a generous free plan (includes 2 users, 500 keys, and unlimited projects). 快速、对开发者友好的本地化平台，无缝免费集成 GitHub/GitLab，支持 AI 辅助与人工翻译，慷慨的免费套餐（含 2 名用户、500 个键、无限项目）。

localizely.com 本地化网站 Free for Open Source 开源免费。

Loco 疯子 Free up to 2000 translations, Unlimited translators, ten languages/project, 1000 translatable assets/project 最多 2000 条翻译、无限译者、每项目 10 种语言、每项目 1000 个可翻译资源免费。

POEditor PO编辑器 Free up to 1000 strings 最多 1000 条字符串免费。

SimpleLocalize 简单本地化 Free up to 100 translation keys, unlimited strings, unlimited languages, startup deals 最多 100 个翻译键免费，无限字符串、无限语言，面向创业有优惠。

Texterify 文本化 Free for a single user 单用户免费。

Tolgee 托尔吉 Free SaaS offering with limited translations, forever-free self-hosted version 免费的 SaaS 方案（翻译量有限），自托管版本永久免费。

transifex.com Transifex.com Free for Open Source 开源免费。

Monitoring

Pingzo 平佐 Free tier offers 1 uptime/API monitor with 15-minute check intervals and instant email alerts. 免费套餐提供 1 个可用性/API 监控，15 分钟检查间隔与即时邮件告警。

Accesserty Pulse 辅助脉冲 Accesserty Pulse monitors interaction signals and detectable accessibility risks on live websites. Free plans for everyone and 14-day Pro trial. Accesserty Pulse 监控线上网站的交互信号与可检测的可访问性风险。对所有人均有免费套餐，并提供 14 天 Pro 试用。

AlertKick 警报踢 server security (eBPF agent for Linux), uptime monitoring, on-call alerting/status pages in one product. Free tier includes 10 uptime monitors and heartbeats, 5-minute check intervals, 7-day retention. 服务器安全（Linux eBPF 代理）、可用性监控、值班告警/状态页于一体。免费套餐含 10 个可用性监控与心跳、5 分钟检查间隔、7 天保留。

assertible.com 断言.com Automated API testing and monitoring. Free plans for teams and individuals. 自动化 API 测试与监控。面向团队与个人的免费套餐。

Better Stack 更好的堆栈 Uptime monitoring, incident management, on-call scheduling/alerting, and status pages in a single product. The free plan includes ten monitors with 3-minute check frequency and status pages. 可用性监控、事件管理、值班排班/告警与状态页于一体。免费套餐含 10 个监控（3 分钟检查频率）与状态页。

bleemeo.com Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules. 3 台服务器、5 个可用性监控、无限用户、无限仪表盘、无限告警规则免费。

checklyhq.com Open source E2E / Synthetic monitoring and deep API monitoring for developers. Free plan with one user and 10k API & network / 1.5k browser check runs. 面向开发者的开源 E2E / 综合监控与深度 API 监控。免费套餐含 1 名用户、1 万次 API & 网络/1500 次浏览器检查运行。

Core Web Vitals History 核心网络生命历史 Find Core Web Vitals history for a url or a website. 查找某 URL 或网站的 Core Web Vitals（核心 Web 指标）历史。

cronalive.com Heartbeat monitoring for cron jobs, plus HTTP uptime and TLS expiry checks, and a Laravel package that creates checks from your scheduler. Free tier with 10 checks, HTTP interval from 5 min, 30 days of history, 50k pings/mo. cron作业的心跳监控，以及HTTP正常运行时间和TLS到期检查，还有一个从您的调度器创建检查的Laravel包。免费层包含10个检查，HTTP间隔从5分钟开始，30天历史记录，每月50k次ping。

cronitor.io Performance insights and uptime monitoring for cron jobs, websites, APIs and more. A free tier with five monitors. 面向 cron 任务、网站、API 等的性能洞察与可用性监控。5 个监控的免费套餐。

watchcron.com Cron job monitoring with heartbeat pings and alerts. Free tier with up to 5 monitors and email notifications. 带有心跳ping和警报的Cron作业监控。免费层提供最多5个监控器和电子邮件通知。

datadoghq.com 数据狗网站 Free for up to 5 nodes 最多 5 个节点免费。

DeadBro Rails APM with request-based pricing: live traces, slow SQL, N+1 detection, and error tracking. Free forever for 50k requests/month, 7-day retention, 1 app, 1 uptime check, and email alerts. No credit card required. 基于请求计费的 Rails APM：实时跟踪、慢 SQL、N+1 检测和错误跟踪。每月50k请求免费，7天数据保留，1个应用，1次在线检查和邮件警报。无需信用卡。

deadmanssnitch.com Deadmanssnitch.com Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign up 面向 cron 任务的监控。1 个免费 snitch（监控），推荐他人注册可获得更多。

downtimemonkey.com 60 uptime monitors, 5-minute interval. Email, Slack alerts. 60 个可用性监控，5 分钟间隔。邮件、Slack 告警。

drumbeats.io 鼓点io Cron, heartbeat, and uptime monitoring with incident management and status pages. Free for up to 50 monitors with 1-min interval and unlimited team seats. cron、心跳与可用性监控，含事件管理与状态页。最多 50 个监控、1 分钟间隔、无限团队席位免费。

economize.cloud 经济云 Economize helps demystify cloud infrastructure costs by organizing cloud resources to optimize and report the same. Free for up to $5,000 spent on Google Cloud Platform every month. Economize 通过整理云资源来优化并报告云基础设施成本，消除其神秘感。每月在 Google Cloud Platform 上花费最多 5000 美元免费。

fivenines.io Fivenines.io Linux server monitoring with real‑time dashboards and alerting - free forever for up to 5 monitored servers at 60-seconds interval. No credit card required. Linux 服务器监控，含实时仪表盘与告警——最多 5 台受监控服务器、60 秒间隔永久免费。无需信用卡。

FlareWarden 耀斑守望者 Uptime, content, dependency, and SSL monitoring with multi-region verification and status pages. Free plan includes 15 monitors, 5-minute checks, and 90 days of history. 可用性、内容、依赖与 SSL 监控，含多区域校验与状态页。免费套餐含 15 个监控、5 分钟检查、90 天历史。

Grafana Cloud 格拉法纳云 Grafana Cloud is a composable observability platform that integrates metrics and logs with Grafana. Free: 3 users, ten dashboards, 100 alerts, metrics storage in Prometheus and Graphite (10,000 series, 14 days retention), logs storage in Loki (50 GB of logs, 14 days retention) Grafana Cloud 是可组合的可观测性平台，将指标与日志通过 Grafana 集成。免费：3 名用户、10 个仪表盘、100 个告警、Prometheus 与 Graphite 指标存储（1 万序列、14 天保留）、Loki 日志存储（50GB 日志、14 天保留）。

healthchecks.io 健康检查.io Monitor your cron jobs and background tasks. Free for up to 20 checks. 监控你的 cron 任务与后台任务。最多 20 个检查免费。

incidenthub.cloud 事件中心云 Cloud and SaaS status page aggregator - 20 monitors and 2 notification channels (Slack and Discord) are free forever. 云与 SaaS 状态页聚合器——20 个监控与 2 个通知渠道（Slack 与 Discord）永久免费。

inspector.dev 检查员.dev A complete Real-Time monitoring dashboard in less than one minute with a free forever tier. 不到 1 分钟即可获得完整的实时监控仪表盘，含永久免费套餐。

instatus.com Get a beautiful status page in 10 seconds. Free forever with unlimited subs and unlimited teams. 10 秒获得精美状态页。无限订阅与无限团队永久免费。

LastPing Dead man's switch for AI agents, cron jobs and CI. Free for individuals with unlimited monitors and destinations. Let AI agents build monitoring for everything including themselves. AI代理、cron作业和CI的死亡开关。个人用户免费，无限监控器和目的地。让AI代理为包括自身在内的所有事物建立监控。

linkok.com 联科网 Online broken link checker, free for small websites up to 100 pages, completely free for open-source projects. 在线失效链接检查器，最多 100 页的小型网站免费，开源项目完全免费。

loader.io 加载器io Free load testing tools with limitations 功能受限的免费负载测试工具。

MarionetteOps.com Server monitoring, public status pages, and service uptime monitoring. 服务器监控、公开状态页与服务的可用性监控。

Middleware.io 中间件.io Middleware observability platform provides complete visibility into your apps & stack, so you can monitor & diagnose issues at scale. They have a free forever plan for Dev community use that allows Log monitoring for up to 1M log events, Infrastructure monitoring & APM for up to 2 hosts. Middleware 可观测性平台为你的应用与技术栈提供完整可见性，让你大规模监控并诊断问题。面向开发者社区有永久免费套餐，允许最多 100 万日志事件、最多 2 台主机的基础设施监控与 APM。

MonitorMonk 监控僧 Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages. 极简可用性监控，配精美状态页。永久免费套餐为 10 个网站或 API 端点提供 HTTPS、关键词、SSL 与响应时间监控，并提供 2 个仪表盘/状态页。

netdata.cloud 网络数据云 Netdata is an open-source tool to collect real-time metrics. It's a growing product and can also be found on GitHub! Netdata 是收集实时指标的开源工具。产品持续成长，也可在 GitHub 上找到它！

newrelic.com New Relic observability platform built to help engineers create more perfect software. From monoliths to serverless, you can instrument everything and then analyze, troubleshoot, and optimize your entire software stack. The free tier offers 100GB/month of free data ingest, one free full-access user, and unlimited free primary users. New Relic 可观测性平台，旨在帮助工程师打造更完美的软件。从单体到无服务器，你可检测一切，进而分析、排障并优化整个软件栈。免费套餐提供每月 100GB 免费数据摄入、1 名免费全功能用户与无限免费主用户。

OnlineOrNot.com OnlineOrNot provides uptime monitoring for websites and APIs, monitoring for cron jobs and scheduled tasks. Also provides status pages. The first five checks with a 3-minute interval are free. The free tier sends alerts via Slack, Discord, and Email. OnlineOrNot 提供网站与 API 的可用性监控、cron 任务与计划任务的监控，也提供状态页。前 5 个检查（3 分钟间隔）免费。免费套餐通过 Slack、Discord 与邮件发送告警。

OntarioNet.ca CN Test OntarioNet.ca CN 测试 Check if a website is blocked in China by the Great Firewall. It identifies DNS pollution by comparing DNS results and ASN information detected by servers in China versus servers in the United States. 检查某网站是否被长城（Great Firewall）屏蔽于中国。通过比较中国服务器与美国服务器检测到的 DNS 结果与 ASN 信息识别 DNS 污染。

pagecrawl.io Monitor website changes, free for up to 6 monitors with daily checks. 监控网站变更，最多 6 个监控每日检查免费。

pagertree.com Simple interface for alerting and on-call management. Free up to 5 users. 告警与值班管理的简洁界面。最多 5 名用户免费。

phare.io Uptime Monitoring free for up to 100,000 events for unlimited projects and unlimited status pages. 可用性监控：无限项目、无限状态页最多 10 万事件免费。

pingbreak.com Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email. 现代可用性监控服务。检查无限 URL 并通过 Discord、Slack 或邮件获取宕机通知。

Pingmeter.com 5 uptime monitors with 10-minute interval. Monitor SSH, HTTP, HTTPS, and any custom TCP ports. 5 个可用性监控，10 分钟间隔。监控 SSH、HTTP、HTTPS 及任意自定义 TCP 端口。

pingpong.one 乒乓球一号 Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. Pro plan is offered to open-source projects and non-profits free of charge. 带监控的高级状态页平台。免费套餐含 1 个可自定义的 SSL 子域名公开状态页。开源项目与非营利组织可免费使用 Pro 套餐。

Prismix 棱镜混合机 Free REST API (GET /api/v1/statuses) returning real-time operational status for 75+ AI services including OpenAI, Anthropic, Gemini, Mistral, and more. No authentication required. [Free tier available with Pro at $10/month] 免费的 REST API（GET /api/v1/statuses），返回 OpenAI、Anthropic、Gemini、Mistral 等 75+ AI 服务的实时运行状态。无需鉴权。[Pro 套餐 10 美元/月，可用免费层]

Pulsetic 脉冲式 10 monitors, 6 Months of historical Uptime/Logs, unlimited status pages, and custom domains included! For infinite time and unlimited email alerts for free. You don't need a credit card. 10 个监控、6 个月可用性与日志历史、无限状态页与自定义域名！永久免费、无限邮件告警。无需信用卡。

robusta.dev 鲁布斯塔开发者 Powerful Kubernetes monitoring based on Prometheus. Bring your own Prometheus or install the all-in-one bundle. The free tier includes up to 20 Kubernetes nodes. Alerts via Slack, Microsoft Teams, Discord, and more. Integrations with PagerDuty, OpsGenie, VictorOps, DataDog, and many other tools. 基于 Prometheus 的强大数据监控。自带 Prometheus 或安装一体化套件。免费套餐最多 20 个 Kubernetes 节点。通过 Slack、Microsoft Teams、Discord 等告警。集成 PagerDuty、OpsGenie、VictorOps、DataDog 等许多工具。

Runframe 运行框架 On-call alerting, incident management, and public/private status pages. The free plan includes up to 5 users, 1 team, 1 on-call schedule, basic status pages, incident lifecycle, and Slack-native incident response. 值班告警、事件管理与公开/私有状态页。免费套餐含最多 5 名用户、1 个团队、1 个值班排班、基础状态页、事件生命周期与 Slack 原生事件响应。

Servervana 服务器瓦纳 Advanced uptime monitoring with support for large projects and teams. Provides HTTP monitoring, Browser based monitoring, DNS monitoring, domain monitoring, status pages and more. The free tier includes 10 HTTP monitors, 1 DNS monitor and one status page. 支持大型项目与团队的高级可用性监控。提供 HTTP 监控、基于浏览器的监控、DNS 监控、域名监控、状态页等。免费套餐含 10 个 HTTP 监控、1 个 DNS 监控与 1 个状态页。

Simple Observability 简单的可观察性 Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server. 统一平台中强大的服务器监控，覆盖指标与日志，无需复杂配置。1 台服务器免费。

sitesure.net 网站 Website and cron monitoring - 2 monitors free 网站与 cron 监控——2 个监控免费。

skylight.io 天光io Free for first 100,000 requests (Rails only) 前 10 万次请求免费（仅限 Rails）。

statuscake.com 状态蛋糕网 Website monitoring, unlimited tests free with limitations 网站监控，无限测试免费（功能受限）。

statusgator.com Status page monitoring, 3 monitors free 状态页监控，3 个监控免费。

supaguard.app 超级卫士应用程序 Synthetic monitoring from 20+ global regions. The free tier includes 1,000 browser checks/mo with AI-driven self-healing and automated test generation. 来自 20+ 全球区域的综合监控。免费套餐含每月 1000 次浏览器检查，配 AI 驱动自愈与自动化测试生成。

superlog.sh 超级日志 Open-source OpenTelemetry observability (traces, logs, and metrics) with AI-agent incident investigation. The free tier includes 1M spans, 5M logs, and 10M metric points per month with 30-day retention, no credit card required. Fully open-source and self-hostable. 开源 OpenTelemetry 可观测性（追踪、日志与指标），含 AI 智能体事件调查。免费套餐每月含 100 万 span、500 万日志、1000 万指标点、保留 30 天，无需信用卡。完全开源且可自托管。

SweetUptime 甜蜜正常运行时间 Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 server, 10 uptime, and 10 domain for free. 服务器监控、可用性监控、DNS 与域名监控。免费监控 10 台服务器、10 个可用性、10 个域名。

syagent.com Noncommercial free server monitoring service, alerts and metrics. 非商业免费服务器监控服务、告警与指标。

UptimeObserver.com Get 20 uptime monitors with 5-minute intervals and a customizable status page-even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. No credit card needed to get started. 获取 20 个可用性监控（5 分钟间隔）与可自定义状态页——即便商用亦可。无限实时通知通过邮件与 Telegram。无需信用卡即可开始。

uptimetoolbox.com Free monitoring for five websites, 3-minute intervals, public statuspage. 5 个网站免费监控，3 分钟间隔，公开状态页。

Wachete 瓦切特 monitor five pages, checks every 24 hours. 监控 5 个页面，每 24 小时检查一次。

Watchgoose Cron job and heartbeat monitoring and status pages for scheduled tasks, backups and background jobs, MCP server available. Free tier: 10 checks, 200 ping log entries, email/chat/webhook alerts, no credit card. Open Source support program for qualifying OS projects. 定时任务、心跳监控和状态页面，用于计划任务、备份和后台作业，提供MCP服务器。免费层：10次检查，200条ping日志条目，邮件/聊天/webhook警报，无需信用卡。符合条件的开源项目支持计划。

Xitoring.com 西托灵网 Uptime monitoring: 20 free, Linux and Windows Server monitoring: 5 free, Status page: 1 free - Mobile app, multiple notification channel, and much more! 可用性监控：20 免费；Linux 与 Windows 服务器监控：5 免费；状态页：1 免费——移动应用、多通知渠道等！

UptimeRobot 正常运行时间机器人 Free uptime monitoring for hobby projects. Includes 50 monitors with 5-minute check intervals, supports HTTP, ping, port, and keyword monitoring. 面向爱好项目的免费可用性监控。含 50 个监控（5 分钟检查间隔），支持 HTTP、ping、端口与关键词监控。

Crash and Exception Handling

Axiom 公理 Store up to 0.5 TB of logs with 30-day retention. Includes integrations with platforms like Vercel and advanced data querying with email/Discord notifiers. 存储最多 0.5TB 日志，保留 30 天。含与 Vercel 等平台的集成及带邮件/Discord 通知的高级数据查询。

Bugsink 虫槽 Error-tracking with Sentry-SDK compatibility. Free for up to 5,000 errors/month, or unlimited use when self-hosted. 兼容 Sentry-SDK 的错误追踪。每月最多 5000 个错误免费，或自托管无限使用。

bugsnag.com Free for up to 2,000 errors/month after the initial trial 初始试用后最多每月 2000 个错误免费。

CatchJS.com JavaScript error tracking with screenshots and click trails. Free for open-source projects. 带截图与点击轨迹的 JavaScript 错误追踪。开源项目免费。

elmah.io 埃尔玛.io Error logging and uptime monitoring for web developers. Free Small Business subscription for open-source projects. 面向 Web 开发者的错误日志与可用性监控。开源项目免费 Small Business 订阅。

Embrace 拥抱 Mobile app monitoring. Free for small teams with up to 1 million user sessions per year. 移动应用监控。小团队每年最多 100 万用户会话免费。

exceptionless 无一例外 Real-time error, feature, log reporting, and more. Free for 3k events per month/1 user. Open source and easy to self-host for unlimited use. 实时错误、功能、日志报告等。每月 3000 事件/1 用户免费。开源且易于自托管无限使用。

GlitchTip 故障提示 Simple, open-source error tracking. Compatible with open-source Sentry SDKs. 1000 events per month for free, or can self-host with no limits 简单、开源的错误追踪。兼容开源 Sentry SDK。每月 1000 事件免费，或自托管无限制。

honeybadger.io 蜜獾io Exception, uptime, and cron monitoring. Free for small teams and open-source projects (12,000 errors/month). 异常、可用性与 cron 监控。小团队与开源项目免费（每月 1.2 万个错误）。

Jam 果酱 Developer friendly bug reports in one click. Free plan with unlimited jams. 一键生成对开发者友好的缺陷报告。无限 jam 的免费套餐。

memfault.com Cloud device observability and debugging platform. 100 devices free for Nordic, NXP, and Laird devices. 云设备可观测性与调试平台。Nordic、NXP 与 Laird 设备最多 100 台免费。

rollbar.com Exception and error monitoring, free plan with 5,000 errors/month, unlimited users, 30 days retention 异常与错误监控，免费套餐每月 5000 个错误、无限用户、保留 30 天。

Semaphr 塞马弗 Free all-in-one kill switch for your mobile apps. 面向移动应用的免费一体化开关（kill switch）。

sentry.io 哨兵io Sentry tracks app exceptions in real-time and has a small free plan. Free for 5k errors per month/ 1 user, unrestricted use if self-hosted Sentry 实时追踪应用异常，含小型免费套餐。每月 5000 错误/1 用户免费，自托管无限制。

Vinktar Error tracking and product analytics in one tool, set up and queried by your coding agent over MCP. Free for 1M events and 50k errors per month, no card required. 在一个工具中进行错误跟踪和产品分析，通过MCP由您的编码代理设置和查询。每月免费1百万事件和5万个错误，无需信用卡。

Whitespace 空白 One-click bug reports straight in your browser. Free plan with unlimited recordings for personal use. 浏览器中一键生成缺陷报告。个人使用无限录制免费套餐。

Search

algolia.com Hosted search solution with typo-tolerance, relevance, and UI libraries to easily create search experiences. The free "Build" plan includes 1M documents and 10K searches/month. Also offers developer documentation search for free. 托管搜索方案，具备容错拼写、相关性与 UI 库，轻松创建搜索体验。免费 "Build" 套餐含 100 万文档与每月 1 万次搜索。另免费提供开发者文档搜索。

bonsai.io 盆景io Free 1 GB memory and 1 GB storage 1GB 内存与 1GB 存储免费。

CommandBar 命令栏 Unified Search Bar as-a-service, web-based UI widget/plugin that allows your users to search contents, navigations, features, etc. within your product, which helps discoverability. Free for up to 1,000 Monthly Active Users, unlimited commands. 统一搜索栏即服务，基于 Web 的 UI 组件/插件，让你的用户可在产品内搜索内容、导航、功能等，提升可发现性。最多 1000 月活用户、无限命令免费。

searchly.com 搜索网 Free 2 indices and 20 MB storage 免费 2 个索引与 20MB 存储。

Education and Career Development

Cisco Networking Academy, Skills for All 思科网络学院，面向所有人的技能 Offers free certification-aligned courses in topics like cybersecurity, networking, and Python. 提供与认证对齐的免费课程，主题涵盖网络安全、网络与 Python 等。

CloudCertPrep 云证书准备 Free, open-source AWS certification practice exams with 1,050+ questions for CLF-C02. Features timed mock exams, domain practice, spaced repetition, and progress tracking. 免费、开源的 AWS 认证练习题，含 CLF-C02 的 1050+ 道题。具备计时模拟考试、领域练习、间隔重复与进度跟踪。

CodeTrain 代码列车 AI coding tutor that teaches you on your own codebase and never writes the code for you. Free tier: 10 in-browser lessons/month, Python/JS run client-side, no card required. AI 编程导师，基于你自己的代码库教学，且从不替你写代码。免费套餐：每月 10 节浏览器内课程、Python/JS 客户端运行、无需信用卡。

DeepLearning.AI Short Courses DeepLearning.AI 短期课程 Free short courses from industry-leading experts to get hands-on experience with the latest generative AI tools and techniques in an hour or less. 来自业界顶尖专家、可在 1 小时或更短时间内动手体验最新生成式 AI 工具与技术的免费短课程。

DevOpsLesson Free DevOps tutorials, cheatsheets, troubleshooting guides, roadmaps, interview preparation and DevOps tools: Dockerfile Linter, K8S YAML file generator, Regex Tester. 免费的DevOps教程、速查表、故障排除指南、路线图、面试准备和DevOps工具：Dockerfile检查器、K8S YAML文件生成器、正则表达式测试器。

DevNet Academy 开发网络学院 Free, self-paced training for the Cisco DevNet Expert / CCIE Automation certification. Covers Python Click and Flask-RESTx. 面向 Cisco DevNet Expert / CCIE 自动化认证的免费、自定进度培训。涵盖 Python Click 与 Flask-RESTx。

Django-tutorial.dev Free online guides for learning Django as their first framework & gives free dofollow backlink to articles written by users. 面向以 Django 为第一门框架的学习者的免费在线指南，并为用户撰写的文章提供免费 dofollow 反向链接。

edX Offers access to over 4,000 free online courses from 250 leading institutions, including Harvard and MIT, specializing in computer science, engineering, and data science. 提供来自 250 所顶尖院校（含哈佛与 MIT）的 4000+ 门免费在线课程，专长于计算机科学、工程与数据科学。

Exercism 锻炼 Free, open-source programming education in over 75 programming languages, with human mentoring. A nonprofit organisation. 覆盖 75+ 编程语言、带人工辅导的免费开源编程教育。非营利组织。

Free Professional Resume Templates & Editor 免费专业简历模板和编辑器 Free platform with lots of Resume templates of Experienced Professionals, ready to clone and edit fully and download, ATS optimized. 免费平台，提供大量资深专业人士简历模板，可完整克隆、编辑并下载，针对 ATS（招聘系统）优化。

FreeCodeCamp 自由编程营 Open-source platform offering free courses and certifications in Data Analysis, Information Security, Web Development, and more. 开源平台，提供数据分析、信息安全、Web 开发等领域的免费课程与认证。

Full Stack Open 全栈开放 Free university-level course on modern web development with React, Node.js, GraphQL, TypeScript, and more. Fully online and self-paced. 现代 Web 开发（React、Node.js、GraphQL、TypeScript 等）的免费大学级课程。完全在线、自定进度。

Interactive CV 互动简历 AI-powered resume builder with real-time editing and ATS optimization. Free tier includes automatic CV conversion to premium templates (Harvard, Europass), PDF export, job tracker with unlimited job posting insights and CV sharing with chat/voice features. AI 驱动的简历生成器，支持实时编辑与 ATS 优化。免费套餐含自动将 CV 转换为优质模板（Harvard、Europass）、PDF 导出、职位追踪器（无限职位洞察）及带聊天/语音功能的 CV 分享。

Khan Academy 可汗学院 Free online guides for learning basic and advanced HTML/CSS, JavaScript and SQL. 学习基础与进阶 HTML/CSS、JavaScript 与 SQL 的免费在线指南。

LabEx 实验室实验室 Develop skills in Linux, DevOps, Cybersecurity, Programming, Data Science, and more through interactive labs and real-world projects. 通过交互式实验与真实项目，培养 Linux、DevOps、网络安全、编程、数据科学等技能。

MIT OpenCourseWare 麻省理工学院开放课件 MIT OpenCourseWare is an online publication of materials from over 2,500 MIT courses, freely sharing knowledge with learners and educators around the world. Youtube channel can be found at @mitocw MIT OpenCourseWare 是 MIT 2500+ 门课程资料的在线发布，向全球学习者与教育者自由共享知识。YouTube 频道 @mitocw。

Reactive Resume 反应式简历 Free, open-source resume builder with dozens of templates. Exports to PDF, DOCX and also provides a publicly shareable link to the resume (opt-in). 免费、开源的简历生成器，含数十种模板。可导出 PDF、DOCX，并提供可公开分享的简历链接（可选）。

Roadmap.sh 路线图.sh Free learning roadmaps covering all aspects of development from Blockchain to UX Design. 覆盖从区块链到 UX 设计等开发各领域的免费学习路线图。

The Odin Project 奥丁计划 Free, open-source platform with a curriculum focused on JavaScript and Ruby for web development. 专注于 JavaScript 与 Ruby Web 开发、免费开源的课程平台。

W3Schools W3学校 Offers free tutorials on web development technologies like HTML, CSS, JavaScript, and more. 提供 HTML、CSS、JavaScript 等 Web 开发技术的免费教程。

WebTerm Learn Learn the Linux terminal, Git and Vim in a simulated terminal in the browser. All 129 lessons are free; the first lesson of each course needs no account. 在浏览器中的模拟终端中学习Linux终端、Git和Vim。所有129个课程都是免费的；每个课程的第一个课程无需账户。

Email

Unitpost AI-First Transactional & Marketing Email Service. Free tier: 5,000 emails/mo, 200 emails/day, 10,000 contacts, 5 domains. No credit card required. SDKs, MCP and REST API available. AI 首先的交易和营销电子邮件服务。免费版：每月 5,000 封电子邮件，每天 200 封电子邮件，10,000 个联系人，5 个域名。无需信用卡。提供 SDK、MCP 和 REST API。

10minutemail 10分钟邮件 Free, temporary email for testing. 免费的测试用临时邮箱。

AhaSend 啊哈发送 Transactional email service, free for 1000 emails per month, with unlimited domains, team members, webhooks and message routes in the free plan. 事务邮件服务，每月 1000 封邮件免费，免费套餐含无限域名、团队成员、Webhooks 与消息路由。

AnonAddy 匿名阿迪 Open-source anonymous email forwarding, create unlimited email aliases for free 开源匿名邮件转发，免费创建无限邮件别名。

anon.li Alias anon.li 别名 Open source, anonymous email alias/forwarding solution with PGP encryption, reply capability, 10 random & 1 custom alias on the free plan with developer API & CLI. 开源、匿名邮件别名/转发方案，含 PGP 加密、回复能力，免费套餐含 10 个随机与 1 个自定义别名，配开发者 API 与 CLI。

Antideo 安蒂迪奥 10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required. 免费套餐每小时 10 次 API 请求，用于邮箱验证、IP 与电话号码校验。无需信用卡。

Anypost 任何邮局 transactional and broadcast email API. 3,000 emails/month free, then as low as 8¢ per 1k 事务与广播邮件 API。每月 3000 封邮件免费，之后每千封低至 8 美分。

Atomic Mail Email built for AI agents, entirely free. Programmatic inbox creation, custom domains, and full send/receive over the open JMAP standard (RFC 8620/8621); hosted MCP server available. A real mailbox service, not disposable/temporary email. 为AI代理构建的电子邮件，完全免费。程序化收件箱创建、自定义域名以及通过开放的JMAP标准（RFC 8620/8621）进行完整的发送/接收；提供托管MCP服务器。真正的邮箱服务，非一次性/临时电子邮件。

Brevo 布雷沃 9,000 emails/month, 300 emails/day free 每月 9000 封邮件、每天 300 封免费。

Bump 撞 Free 10 Bump email addresses, one custom domain 免费 10 个 Bump 邮箱地址、1 个自定义域名。

Burnermail 燃烧邮件 Free 5 Burner Email Addresses, 1 Mailbox, 7-day Mailbox History 免费 5 个一次性邮箱地址、1 个邮箱、7 天邮箱历史。

Buttondown 扣扣 Newsletter service. Up to 100 subscribers free 新闻邮件服务。最多 100 名订阅者免费。

Canny Pigeons 精明的鸽子 DMARC monitoring platform with DNS drift alerts, IP threat intel and unlimited users. First domain is free - no credit card required. 带 DNS 漂移告警、IP 威胁情报与无限用户的 DMARC 监控平台。首个域名免费——无需信用卡。

Conduit 导管 Turn incoming emails into webhooks to trigger your API from emails. The service is completely free. 将收到的邮件转为 Webhook，以从邮件触发你的 API。服务完全免费。

Contact.do 联系方式.do Contact form in a link (bitly for contact forms) 链接中的联系表单（联系表单界的 bitly）。

debugmail.io 调试邮件.io Easy to use testing mail server for developers 面向开发者的易用测试邮件服务器。

dkimvalidator.com Test if the email's DNS/SPF/DKIM/DMARC settings are correct, free service by roundsphere.com 测试邮箱的 DNS/SPF/DKIM/DMARC 设置是否正确，roundsphere.com 提供的免费服务。

DNSExit DNS退出 Up to 2 Email addresses under your domain for free with 100MB of storage space. IMAP, POP3, SMTP, SPF/DKIM support. 你的域名下最多 2 个邮箱地址免费，100MB 存储空间。支持 IMAP、POP3、SMTP、SPF/DKIM。

Email Spam Tester 邮件垃圾邮件测试器 Tests the technical part, content, link authority and overall score of your email. Also tests where your email will land: inbox, spam or promotions. Inbox tests on Gmail, GMX, Yahoo, AOL and other email providers. Free to use, no card or registration required. Also works via API and MCP. 测试您的邮件的技术部分、内容、链接权威性和总体得分。同时测试您的邮件将落在何处：收件箱、垃圾邮件或推广。收件箱测试在Gmail、GMX、Yahoo、AOL和其他电子邮件提供商上进行。免费使用，无需卡片或注册。还支持通过API和MCP使用。

EmailGuard 电子邮件卫士 Block disposable emails, catch typos, and validate MX records via a simple API. 100 free requests/month. 通过简单 API 拦截一次性邮箱、捕获拼写错误并校验 MX 记录。每月 100 次免费请求。

EmailJS 电子邮件JS This is not an entire email server; this is just an email client that you can use to send emails right from the client without exposing your credentials, the free tier has 200 monthly requests, 2 email templates, Requests up to 50Kb, Limited contacts history. 这不是完整邮件服务器；只是邮件客户端，可在不暴露凭据的情况下从客户端直接发送邮件。免费套餐每月 200 次请求、2 个邮件模板、请求最大 50KB、联系历史受限。

EmailLabs.io 电子邮件实验室 Send up to 9,000 Emails for free every month, up to 300 emails daily. 每月最多免费发送 9000 封邮件，每天最多 300 封。

EmailQo Email Infrastructure Grader EmailQo 电子邮件基础设施分级器 Free email infrastructure grader that checks SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required. 免费邮件基础设施评分器，检查 SPF、DKIM、DMARC 与邮件服务器配置。对任意域名按 100 分制评分。无需注册。

EmailOctopus 电邮八达通 Up to 2,500 subscribers and 10,000 emails per month free 最多 2500 名订阅者、每月 1 万封邮件免费。

Emailvalidation.io 电子邮件验证.io 100 free email verifications per month 每月 100 次免费邮箱验证。

Emitlo 埃米特洛 free 12,000 emails/month, Email API and SMTP, SPF/DKIM/DMARC support, No Credit Cards are required. 每月免费 1.2 万封邮件，含邮件 API 与 SMTP、SPF/DKIM/DMARC 支持，无需信用卡。

EtherealMail 空灵邮件 Ethereal is a fake SMTP service, mainly aimed at Nodemailer and EmailEngine users (but not limited to). It's an entirely free anti-transactional email service where messages never get delivered. Ethereal 是伪 SMTP 服务，主要面向 Nodemailer 与 EmailEngine 用户（但不限）。它是完全免费的"反事务"邮件服务，邮件永不被投递。

forwardemail.net 转发电子邮件网 Free email forwarding for custom domains. Create and forward an unlimited amount of email addresses with your domain name (**note**: You must pay if you use .casa, .cf, .click, .email, .fit, .ga, .gdn, .gq, .lat, .loan, .london, .men, .ml, .pl, .rest, .ru, .tk, .top, .work TLDs due to spam) 自定义域名的免费邮件转发。用你的域名创建并转发无限数量的邮箱地址（**注意**：使用 .casa、.cf、.click、.email、.fit、.ga、.gdn、.gq、.lat、.loan、.london、.men、.ml、.pl、.rest、.ru、.tk、.top、.work 等 TLD 因垃圾邮件须付费）。

Imitate Email 模仿电子邮件 Sandbox Email Server for testing email functionality across build/qa and ci/cd. Free accounts get 15 emails a day forever. 跨构建/QA 与 CI/CD 测试邮件功能的沙箱邮件服务器。免费账号永久每天 15 封邮件。

ImprovMX 改进MX Free email forwarding. 免费邮件转发。

Inboxes App 收件箱应用程序 Create up to 3 temporary emails a day, then delete them when you're done from within a handy Chrome extension. Perfect for testing signup flows. 每天最多创建 3 个临时邮箱，完成后通过便捷的 Chrome 扩展删除。非常适合测试注册流程。

inboxkitten.com Free temporary/disposable email inbox, with up to 3-day email auto-deletes. Open source and can be self-hosted. 免费临时/一次性邮箱收件箱，最多 3 天自动删除邮件。开源且可自托管。

Is It Disposable Detect and block disposable email addresses. Free plan of 250 lookups a month and no card required. 检测并阻止一次性电子邮件地址。每月免费 250 次搜索，无需信用卡。

KaiMail 凯邮 Email forwarding for custom domains with ARC/DKIM signing. Free plan includes 1 domain, 1 mailbox, 300 emails/month, and up to 1MB message size. Email receiving webhook also available. Special plans for open-source projects. 带 ARC/DKIM 签名的自定义域名邮件转发。免费套餐含 1 个域名、1 个邮箱、每月 300 封邮件、最大 1MB 消息。也提供邮件接收 Webhook。开源项目有特别方案。

mail-tester.com Test if the email's DNS/SPF/DKIM/DMARC settings are correct, 20 free/month. 测试邮箱的 DNS/SPF/DKIM/DMARC 设置是否正确，每月 20 次免费。

Maileroo 麦勒罗 SMTP relay and email API for developers. 5,000 emails per month, unlimited domains, free email verification, blacklist monitoring, mail tester and more. 面向开发者的 SMTP 中继与邮件 API。每月 5000 封邮件、无限域名、免费邮箱验证、黑名单监控、邮件测试等。

mailcatcher.me 邮件捕手我 Catches mail and serves it through a web interface. 捕获邮件并通过 Web 界面提供。

mailchannels.com 邮件频道 Email API with REST API and SMTP integrations, free for upto 3,000 emails/month. 带 REST API 与 SMTP 集成的邮件 API，每月最多 3000 封邮件免费。

Mailcheck.ai 邮件检查.ai Prevent users to sign up with temporary email addresses, 120 requests/hour (~86,400 per month) 防止用户用临时邮箱地址注册，每小时 120 次请求（约每月 8.64 万次）。

Maildroppa 邮差帕 Up to 100 subscribers and unlimited emails as well as automations for free. 最多 100 名订阅者、无限邮件与自动化免费。

MailerLite.com 1,000 subscribers/month, 12,000 emails/month free 每月 1000 名订阅者、1.2 万封邮件免费。

MailerSend.com 邮件发送网站 Email API, SMTP, 500 emails/month free for transactional emails, 100 API requests/day 邮件 API、SMTP，每月 500 封邮件免费（事务邮件），每天 100 次 API 请求。

mailinator.com Free, public email system where you can use any inbox you want 免费、公开的邮件系统，可使用任意想要的收件箱。

Mailjet 邮机 6,000 emails/month free (200 emails daily sending limit) 每月 6000 封邮件免费（每天发送上限 200 封）。

mailsac.com Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit) 临时邮箱测试的免费 API、免费公共邮件托管、出站捕获、邮件转 Slack/WebSocket/Webhook（每月 1500 次 API 上限）。

Mailtrap.io 邮件陷阱io Email API and SMTP with 4,000 emails/month free, limited to 150 emails/day. Email Marketing includes 500 contacts and 1,500 emails/month. Email Sandbox includes 50 test emails/month, one sandbox, and up to 10 stored emails. 邮件 API 与 SMTP，每月 4000 封邮件免费，限每天 150 封。邮件营销含 500 联系人、每月 1500 封。邮件沙箱含每月 50 封测试邮件、1 个沙箱、最多 10 封存储邮件。

Mutant Mail 变异邮件 Free 10 Email IDs, 1 Domain, 1 Mailbox. Single Mailbox for All Email IDs. 免费 10 个邮件 ID、1 个域名、1 个邮箱。所有邮件 ID 共用一个邮箱。

OneSignal onesignal.com 10,000 emails/month,No Credit Cards are required.

Orbisearch 奥比搜索 Free bulk email validator, 100 validations per day, no signup required. 免费批量邮箱验证器，每天 100 次验证，无需注册。

Parsio.io 帕西奥.io Free email parser (Forward email, extract the data, send it to your server) 免费邮件解析器（转发邮件、提取数据、发送到你的服务器）。

Plunk 普朗克 3K emails/month for free 每月 3000 封邮件免费。

Postmark 邮戳 100 emails/month free, unlimited DMARC weekly digests. 每月 100 封邮件免费，无限 DMARC 每周摘要。

Proton Mail 质子邮件 Free secure email account service provider with built-in end-to-end encryption. Free 1GB storage. 内置端到端加密的免费安全邮箱账户服务商。免费 1GB 存储。

Reloop 重新循环 Transactional email API and SMTP for developers. Free plan: 3,000 emails/month, 200 emails/day, one custom domain and one agent inbox. 面向开发者的事务邮件 API 与 SMTP。免费套餐：每月 3000 封邮件、每天 200 封、1 个自定义域名与 1 个代理收件箱。

Resend 重新发送 Transactional emails API for developers. 3,000 emails/month, 100 emails/day free, one custom domain. 面向开发者的事务邮件 API。每月 3000 封邮件、每天 100 封免费、1 个自定义域名。

SendBridge Mail Tester SendBridge邮件测试仪 Free email deliverability test with no signup. Generates a unique inbox address, then analyzes SPF, DKIM, DMARC, Rspamd spam score, 23+ RBL blacklists, reverse DNS, and content quality. Unlimited tests, results in seconds, shareable report pages. 免注册的免费邮件送达性测试。生成专属收件箱地址，分析 SPF、DKIM、DMARC、Rspamd 垃圾评分、23+ RBL 黑名单、反向 DNS 与内容质量。无限测试、秒出结果、可分享报告页。

Sender 发件人 Up to 15,000 emails/month, up to 2,500 subscribers 每月最多 1.5 万封邮件、最多 2500 名订阅者免费。

Sendpulse 发送脉冲 500 subscribers/month, 15,000 emails/month free 每月 500 名订阅者、1.5 万封邮件免费。

SendRaven SendRaven provides an email API for transactional email and agent-driven conversations, including inbound replies and threads. The free tier includes 3,000 outbound emails per month, unlimited contacts and inbound replies, card is required. SendRaven 提供用于事务性邮件和代理驱动的对话的电子邮件 API，包括入站回复和线程。免费层每月包含 3,000 封出站邮件，无限联系人数量和入站回复，需要卡片。

SendStreak 发送条纹 Email framework as a service, that adds templates, automations, history, etc to your own SMTP server (E.g. AWS, Maileroo, Gmail). Free up to 100 emails/day, no time limit. 邮件框架即服务，为你的 SMTP 服务器（如 AWS、Maileroo、Gmail）添加模板、自动化、历史等。免费最多每天 100 封邮件，无时间限制。

SimpleLogin 简单登录 Open source, self-hostable email alias/forwarding solution. Free 10 Aliases, unlimited bandwidth, unlimited reply/send. Free for educational staff (student, researcher, etc.). 开源、可自托管的邮件别名/转发方案。免费 10 个别名、无限带宽、无限回复/发送。教育人员（学生、研究者等）免费。

SMTPfast SMTPfast is a simple email API for developers with a free tier that includes 3,000 emails/month, 1 domain, and 1,000 contacts, with no credit card required. SMTPfast 是一个简单的电子邮件 API，开发者可以免费使用，每月包含 3,000 封邮件、1 个域名和 1,000 个联系人，无需信用卡。

Substack 子栈 Unlimited free newsletter service. Start paying when you charge for it. 无限免费新闻邮件服务。开始收费后再付费。

Suped 超级 A user-friendly DMARC monitoring platform. The free plan covers one domain with up to 1,000 emails per month. 对用户友好的 DMARC 监控平台。免费套餐覆盖 1 个域名，每月最多 1000 封邮件。

Sweego 斯威戈 European transactional emails API for developers. 100 emails/day free. 面向开发者的欧洲事务邮件 API。每天 100 封免费。

temp-mail.io 临时邮件.io Free disposable temporary email service with multiple emails at once and forwarding 免费一次性临时邮箱服务，支持同时使用多个邮箱与转发。

Temp-Mail.org 临时邮件网 Temporary / Disposable Mail Gen Utilizing a range variety of domain. Email Address refreshes every time the page is reloaded. It is entirely free and does not include any pricing for their services. 利用多种域名生成临时/一次性邮箱。页面每次刷新邮箱地址即更新。完全免费，无任何收费方案。

TempMailDetector.com Verify up to 200 emails a month for free and see if an email is temporary or not. 每月最多免费验证 200 个邮箱是否临时。

trashmail.com 垃圾邮件网站 Free disposable email addresses with forwarding and automatic address expiration 带转发与地址自动过期功能的免费一次性邮箱地址。

Tuta 图塔 Free secure email account service provider with built-in end-to-end encryption, no ads, no tracking. Free 1GB storage, one calendar (Tuta also have an paid plan.). Tuta is also partially open source, so you can self-host. 内置端到端加密、无广告、无追踪的免费安全邮箱账户服务商。免费 1GB 存储、1 个日历（Tuta 另有付费方案）。Tuta 部分开源，可自托管。

Verifalia 维里法利亚 Real-time email verification API with mailbox confirmation and disposable email address detector; 25 free email verifications/day. 带收件箱确认与一次性邮箱检测器的实时邮箱验证 API；每天 25 次免费邮箱验证。

verimail.io Bulk and API email verification service. 100 free verifications/month 批量与 API 邮箱验证服务。每月 100 次免费验证。

Waitlio 怀特利奥 Waitlist management software for product launches. Create branded waitlist pages, collect and verify email subscribers, manage signups with tags and analytics. Free plan includes 100 subscribers/month, 1 waitlist, and API access. 产品发布的候补名单管理软件。创建品牌候补页、收集并验证邮箱订阅者、用标签与分析管理注册。免费套餐含每月 100 名订阅者、1 个候补名单与 API 访问。

Wraps 裹布 Email infrastructure deployed to your own AWS account (SES), with a dashboard. Pay AWS directly for sending. Free plan covers 1 AWS account, unlimited domains and contacts. 部署到您自己的AWS账户（SES）的电子邮件基础设施，带有仪表板。直接向AWS支付发送费用。免费计划覆盖1个AWS账户、无限域名和联系人。

ZeroSMTP 零SMTP Free SMTP relay on the msgwing.com domain, up to 200 emails/day, no paid tier. Sends from a shared @msgwing.com address only (no custom domain). Ready-to-run code examples in 15 languages plus Windows Server/Linux/network printer setup guides. msgwing.com 域名上的免费 SMTP 中继，每天最多 200 封邮件，无付费档。仅从共享的 @msgwing.com 地址发送（无自定义域名）。提供 15 种语言及 Windows Server/Linux/网络打印机配置指南的即用代码范例。

Feature Toggles Management Platforms

Abby 艾比 Open-Source feature flags & A/B testing. Configuration as Code & Fully Typed Typescript SDKs. Strong integration with Frameworks such as Next.js & React. Generous free tier and cheap scaling options. 开源功能开关与 A/B 测试。配置即代码、完全类型化的 TypeScript SDK。与 Next.js & React 等框架强集成。慷慨的免费套餐与廉价扩展选项。

ConfigCat 配置猫 ConfigCat is a developer-centric feature flag service with unlimited team size, excellent support, and a reasonable price tag. Free plan up to 10 flags, two environments, 1 product, and 5 Million requests per month. 以开发者为中心、团队规模无限、支持完善、价格合理的功能开关服务。免费套餐最多 10 个开关、2 个环境、1 个产品、每月 500 万次请求。

Flagsmith 旗匠 Release features with confidence; manage feature flags across web, mobile, and server-side applications. Use our hosted API, deploy to your own private cloud, or run on-premise. 自信地发布功能；跨 Web、移动与服务器端应用管理功能开关。可使用托管 API、部署到你的私有云或本地运行。

GrowthBook 成长书 Open source feature flag and A/B testing provider with built-in Bayesian statistical analysis engine. Free for up to 3 users, unlimited feature flags and experiments. 开源功能开关与 A/B 测试提供商，内置贝叶斯统计分析引擎。最多 3 名用户、无限功能开关与实验免费。

Rollgate 卷闸门 EU-hosted feature flag management with scheduled releases, instant rollback, and A/B testing. 12 SDKs included. Free plan up to 500K API requests/month, unlimited flags, 3 team members, no credit card required. 欧盟托管的功能开关管理，含计划发布、即时回滚与 A/B 测试。含 12 个 SDK。免费套餐每月最多 50 万次 API 请求、无限开关、3 名团队成员，无需信用卡。

Hypertune 超调 Type-safe feature flags, A/B testing, analytics and app configuration, with Git-style version control and synchronous, in-memory, local flag evaluation. Free for up to 5 team members with unlimited feature flags and A/B tests. 类型安全的功能开关、A/B 测试、分析与应用配置，配 Git 式版本控制与同步、内存中、本地的开关求值。最多 5 名团队成员、无限功能开关与 A/B 测试免费。

Statsig 统计数据 A robust platform for feature management, A/B testing, analytics, and more. Its generous free plan offers unlimited seats, flags, experiments, and dynamic configurations, supporting up to 1 million events per month. 功能管理、A/B 测试、分析等稳健平台。慷慨的免费套餐提供无限席位、开关、实验与动态配置，支持每月最多 100 万事件。

Toggled.dev 切换.dev Enterprise-ready, scalable multi-regional feature toggles management platform. Free plan up to 10 flags, two environments, unlimited requests. SDK, analytics dashboard, release calendar, Slack notifications, and all other features are included in the endless free plan. 企业级、可扩展的多区域功能开关管理平台。免费套餐最多 10 个开关、2 个环境、无限请求。SDK、分析仪表盘、发布日历、Slack 通知及所有其他特性均包含在无尽的免费套餐中。

Font

Befonts 贝丰茨 Provides several unique fonts for personal or commercial use. 提供多款独特字体供个人或商业使用。

Bunny 兔子 Privacy oriented Google Fonts 注重隐私的 Google Fonts 替代。

dafont 达丰特 The fonts presented on this website are their authors' property and are either freeware, shareware, demo versions, or public domain. 本网站展示的字体归其作者所有，多为免费软件、共享软件、演示版或公共领域。

Everything Fonts 一切字体 Offers multiple tools; @font-face, Units Converter, Font Hinter and Font Submitter. 提供多种工具：@font-face、单位转换、字体微调（Hinter）与字体提交器。

Font of web 网页字体 Identify all the fonts used on a website and how they are used. 识别网站上使用的全部字体及其使用方式。

Font Squirrel 松鼠字体 Freeware fonts licensed for commercial work. Hand-selected these typefaces and presented them in an easy-to-use format. 授权用于商业工作的免费字体。手工挑选这些字体并以易用格式呈现。

FontGet 字体获取 Has a variety of fonts available to download and sorted neatly with tags. 提供多种可下载字体，并以标签整齐分类。

fonts.xz.style 字体.xz.style free and open source service for delivering font families to websites using CSS. 使用 CSS 向网站分发字族（font families）的免费开源服务。

Fontsensei 丰森塞伊 Opensourced Google fonts tagged by users. With CJK (Chinese,Japanese, Korean) font tags. 用户标注的开源 Google 字体。含 CJK（中、日、韩）字体标签。

Fontshare 字体共享 is a free fonts service. It’s a growing collection of professional-grade fonts, 100% free for personal and commercial use. 免费字体服务。持续增长的专业的字体集合，个人与商业使用 100% 免费。

Google Fonts 谷歌字体 Many free fonts are easy and quick to install on a website via a download or a link to Google's CDN. 许多免费字体，可通过下载或链接到 Google CDN 快速轻松安装到网站。

Forms

FabForm 工厂表格 Form backend platform for intelligent developers. The free plan allows 250 form submissions per month. Friendly modern GUI. Integrates with Google Sheets, Airtable, Slack, Email, and others. 面向智能开发者的表单后端平台。免费套餐每月允许 250 次表单提交。友好的现代 GUI。集成 Google Sheets、Airtable、Slack、邮件等。

Feathery 羽毛状 Powerful, developer-friendly form builder. Build signup & login, user onboarding, payment flows, complex financial applications, and more. The free plan allows up to 250 submissions/month and five active forms. 强大、对开发者友好的表单构建器。构建注册与登录、用户引导、支付流程、复杂金融应用等。免费套餐每月最多 250 次提交、5 个活跃表单。

feedback.fish 反馈.fish Free plan allows collecting 25 total feedback submissions. Easy to integrate with React and Vue components provided. 免费套餐允许收集共 25 条反馈提交。提供 React 与 Vue 组件，易于集成。

FluidForms 流体形式 Form builder and backend with AI-driven logic. Free plan includes 100 responses per month, unlimited forms (including AI-created forms), webhooks, and embedding. 带 AI 驱动逻辑的表单构建器与后端。免费套餐含每月 100 次响应、无限表单（含 AI 创建的表单）、Webhooks 与嵌入。

Form.taxi 出租车表格 Endpoint for HTML forms submissions. With notifications, spam blockers, and GDPR-compliant data processing. Free plan for basic usage. HTML 表单提交的端点。含通知、垃圾拦截与符合 GDPR 的数据处理。基础使用免费套餐。

Formboost.app Developer-first form backend with simple HTTP endpoints, 500 free submissions/month, spam protection, email notifications, and built-in Slack, Discord & Telegram integrations. No backend required. 以开发者为先的表单后端，具有简单的HTTP端点，每月500次免费提交，垃圾邮件保护，电子邮件通知，以及内置的Slack、Discord和Telegram集成。无需后端。

Formcarry.com HTTP POST Form endpoint, Free plan allows 100 monthly submissions. HTTP POST 表单端点，免费套餐每月允许 100 次提交。

Formester.com 福斯特网站 Share and embed unique-looking forms on your website-no limits on the number of forms created or features restricted by the plan. Get up to 100 submissions every month for free. 在网站分享并嵌入外观独特的表单——对创建的表单数量与受限功能无限制。每月最多 100 次提交免费。

Forminit 福米尼特 Headless form backend for developers. The free plan allows 100 form submissions per month including file uploads, server-side field validation, email notifications, spam protection and Zapier. 面向开发者的无头（headless）表单后端。免费套餐每月允许 100 次表单提交，含文件上传、服务端字段校验、邮件通知、垃圾防护与 Zapier。

FormKeep.com Unlimited forms with 50 monthly submissions, spam protection, email notification, and a drag-and-drop designer that can export HTML. Additional features include custom field rules, teams, and integrations to Google Sheets, Slack, ActiveCampaign, and Zapier. 无限表单、每月 50 次提交、垃圾防护、邮件通知，以及可导出 HTML 的拖拽设计器。附加特性含自定义字段规则、团队与到 Google Sheets、Slack、ActiveCampaign、Zapier 的集成。

Form Plume 形成羽状 Form Plume is a form backend for HTML and JavaScript forms. One endpoint gets you spam filtering, email notifications, file uploads, webhooks, and a clean inbox. Free for 500 submissions/mo. Form Plume 是面向 HTML 与 JavaScript 表单的表单后端。一个端点即提供垃圾过滤、邮件通知、文件上传、Webhooks 与整洁收件箱。免费 500 次提交/月。

formlets.com Online forms, unlimited single page forms/month, 100 submissions/month, email notifications. 在线表单，每月无限单页表单、100 次提交、邮件通知。

forms.app 表单应用程序 Create online forms with powerful features like conditional logic, automatic score calculator, and AI. Collect up to 100 responses with a free plan, embed your forms on a website, or use them with a link. 用条件逻辑、自动算分与 AI 等强大特性创建在线表单。免费套餐最多收集 100 份响应，可将表单嵌入网站或通过链接使用。

formspark.io Formspark.io Form to Email service, free plan allows unlimited forms, 250 submissions per month, support by Customer assistance team. 表单转邮件服务，免费套餐允许无限表单、每月 250 次提交，由客户支持团队提供支持。

Formspree.io Send email using an HTTP POST request. The free tier limits to 50 submissions per form per month. 通过 HTTP POST 请求发送邮件。免费套餐限制为每表单每月 50 次提交。

Formsubmit.co 表单提交网站 Easy form endpoints for your HTML forms. Free Forever. No registration is required. 为你的 HTML 表单提供易用的表单端点。永久免费。无需注册。

Formware.io Create fully-responsive and captivating forms in seconds, without knowing how to code, and collect unlimited responses for free! 无需编程即可在数秒内创建完全响应式、吸引人的表单，并免费收集无限响应！

HeroTofu.com 英雄豆腐网 Forms backend with bot detection and encrypted archive. Forward submissions via UI to email, Slack, or Zapier. Use your own front end. No server code is required. The free plan gives unlimited forms and 100 submissions per month. 带机器人检测与加密归档的表单后端。通过 UI 将提交转发到邮件、Slack 或 Zapier。使用你自己的前端。无需服务器代码。免费套餐提供无限表单与每月 100 次提交。

HeyForm.net Drag and drop online form builder. The free tier lets you create unlimited forms and collect unlimited submissions. Comes with pre-built templates, anti-spam, and 100MB file storage. 拖拽式在线表单构建器。免费套餐可创建无限表单并收集无限提交。含预置模板、反垃圾与 100MB 文件存储。

Jotform.com Create online forms for free, collect submissions, accept payments, automate workflows, and get documents signed with built-in e-signatures. Free plan includes 5 forms, 100 monthly submissions, 10 e-sign documents, 10 payment submissions, and more. 免费创建在线表单、收集提交、接受支付、自动化工作流，并通过内置电子签名签署文档。免费套餐含 5 个表单、每月 100 次提交、10 份电子签名文档、10 次支付提交等。

Kwes.io 奎斯.io Feature rich form endpoint. Works great with static sites. The free plan includes up to 1 website with up to 50 monthly submissions. 功能丰富的表单端点。与静态站点配合极佳。免费套餐含最多 1 个网站、每月最多 50 次提交。

Lucid Forms Form endpoint for websites. Add working contact forms to any HTML, JS framework, or no-code site without building a backend. Free plan includes 250 submissions/month, email notifications, smart spam filtering, and Google Sheets integration. 网站表单端点。无需构建后端，即可将工作联系表单添加到任何HTML、JS框架或无代码网站。免费计划包括每月250次提交、电子邮件通知、智能垃圾邮件过滤和Google Sheets集成。

Makeform Chat-based form builder. The free form builder with unlimited forms and submissions. 99% of the features are free, includes adding logos, conditional logic, file uploads, payments, integrations, and webhooks. Pro Plan ($19/month) enables remove the Makeform Branding, custom domains and team features. Business plan ($59/month) enables RBAC, email verification and single sign on (SSO). 基于聊天的表单构建器。免费表单构建器，无限制的表单和提交。99%的功能免费，包括添加徽标、条件逻辑、文件上传、支付、集成和webhooks。专业版（每月19美元）可去除Makeform品牌标识、自定义域名和团队功能。企业版（每月59美元）支持RBAC、电子邮件验证和单点登录（SSO）。

Pageclip 页面剪辑 The free plan allows one site, one form, and 1,000 monthly submissions. 免费套餐允许 1 个站点、1 个表单、每月 1000 次提交。

SimplePDF.eu 简单PDF.eu Embed a PDF editor on your website and turn any PDF into a fillable form. The free plan allows unlimited PDFs with three submissions per PDF. 在网站嵌入 PDF 编辑器，将任意 PDF 转为可填写表单。免费套餐允许无限 PDF、每 PDF 3 次提交。

smartforms.dev Powerful and easy form backend for your website, forever free plan allows 50 submissions per month, 250MB file storage, Zapier integration, CSV/JSON export, custom redirect, custom response page, Telegram & Slack bot, single email notifications. 强大且易用的网站表单后端，永久免费套餐每月允许 50 次提交、250MB 文件存储、Zapier 集成、CSV/JSON 导出、自定义跳转、自定义响应页、Telegram & Slack 机器人、单邮件通知。

staticforms.xyz 静态形式.xyz Integrate HTML forms easily without any server-side code for free. After the user submits the form, an email with the form content will be sent to your registered address. 无需任何服务端代码即可免费轻松集成 HTML 表单。用户提交表单后，含表单内容的邮件将发送到你的注册地址。

Survicate 生存 Pull feedback from all sources and send follow-up surveys with one tool. Automatically analyze feedback and extract insights with AI. Free email, website, in-product or mobile surveys, AI survey creator, and 25 monthly responses. 用一个工具从所有渠道拉取反馈并发送后续调查。用 AI 自动分析反馈并提取洞察。免费的邮件、网站、产品内或移动调查、AI 调查创建器与每月 25 份响应。

Tally.so 塔利索 99% of all the features are free. The free tier lets you have: unlimited forms, unlimited submissions, email notifications, form logic, collect payments, file upload, custom thank you page, and many more. 99% 的特性免费。免费套餐提供：无限表单、无限提交、邮件通知、表单逻辑、收款、文件上传、自定义感谢页等。

Typeform.com Include beautifully designed forms on websites. The free plan allows only ten fields per form and 100 monthly responses. 在网站嵌入设计精美的表单。免费套餐每表单仅允许 10 个字段与每月 100 份响应。

Vidhook 维德胡克 Collect feedback using delightful surveys with high response rates. Free plan includes 1 active survey, 25 responses per survey and customizable templates. 用高响应率的精美调查收集反馈。免费套餐含 1 个活跃调查、每调查 25 份响应与可定制模板。

WaiverStevie.com 豁免Stevie.com Electronic Signature platform with a REST API. You can receive notifications with webhooks. Free plan watermarks signed documents but allow unlimited envelopes + signatures. 带 REST API 的电子签名平台。可通过 Webhook 接收通知。免费套餐对签署文档加水印，但允许无限信封与签名。

Web3Forms Contact forms for Static & JAMStack Websites without writing backend code. The free plan allows Unlimited Forms, Unlimited Domains & 250 Submissions per month. 无需编写后端代码的静态与 JAMStack 网站联系表单。免费套餐允许无限表单、无限域名与每月 250 次提交。

Wufoo 乌福 Quick forms to use on websites. The free plan has a limit of 100 submissions each month. 网站上易用的表单。免费套餐每月限制 100 次提交。

FormNX 形式NX Create unlimited forms get unlimited submissions free of cost. Use professionally created 1000+ form templates or create forms from scratch. Get features like email notifications, form logic, collect payments, file upload, custom thank you page, and many more. 免费创建无限表单、获取无限提交。使用专业创建的 1000+ 表单模板或从零创建。含邮件通知、表单逻辑、收款、文件上传、自定义感谢页等特性。

Generative AI

Arize AX Arize AI AI observability and evaluation platform that helps teams understand, evaluate, and continuously improve AI agents and applications. Free plan includes unlimited users and evals, 25k spans and 1GB ingestion per month, 15-day retention, and Signal (10 issues per month). No credit card required. Self-hosting open-source option with Arize Phoenix. 一个AI可观察性和评估平台，帮助团队理解、评估和持续改进AI代理和应用。免费计划包括无限用户和评估，每月25k个跨度，每月1GB摄取量，15天保留期，以及Signal（每月10个问题）。无需信用卡。提供Arize Phoenix的自托管开源选项。

Audio Enhancer 音频增强器 AI-powered audio enhancer SaaS that removes noise and echo while preserving natural vocal clarity. totally Free: unlimited one-click enhancements, no login required, supports MP3/WAV/FLAC AI 驱动、去除噪声与回声同时保留自然人声清晰度的音频增强 SaaS。完全免费：无限一键增强、无需登录、支持 MP3/WAV/FLAC。

Braintrust 智囊团 Evals, prompt playground, and data management for Gen AI. Free plan gives upto 1,000 private eval rows/week. 面向生成式 AI 的评估、提示词 playground 与数据管理。免费套餐每周最多 1000 行私有评估数据。

Clair 克莱尔 Clinical AI Reference. Students have free access to the professional tool suite, which includes Open Search, Clinical Summary, Med Review, Drug Interactions, ICD-10 Codes, and Stewardship. Additionally, a free trial for the professional suite is available. 临床 AI 参考。学生可免费使用专业工具套件，含开放搜索、临床摘要、用药审核、药物相互作用、ICD-10 编码与用药管理。另提供专业套件免费试用。

Comet Opik 奥皮克彗星 Evaluate, test, and ship LLM applications across your dev and production lifecycles. #opensource 在开发与生产生命周期中评估、测试并发布 LLM 应用。#开源

Future AGI 未来通用人工智能 Open-source platform to evaluate, observe, and improve LLM and AI agent apps, with tracing, evals, simulations, and guardrails. Free tier includes 50GB storage, 2K eval credits, 100K AI-gateway requests/month, 1M tokens of text agent simulation and 60 min of voice simulation, plus unlimited projects/seats and BYOK LLM-as-judge at $0 platform cost. #opensource 评估、观测并改进 LLM 与 AI 智能体应用的开源平台，含追踪、评估、模拟与护栏。免费套餐含 50GB 存储、2000 评估额度、每月 10 万次 AI 网关请求、100 万 token 文本智能体模拟与 60 分钟语音模拟，以及无限项目/席位、BYOK 的 LLM-as-judge 平台成本为 0。#开源

Gonka Broker 贡卡经纪人 OpenAI-compatible API for open-source models served over the decentralized Gonka.ai GPU network. 1M+ free tokens monthly. Easy integration with many AI tools. 通过去中心化 Gonka.ai GPU 网络提供开源模型的 OpenAI 兼容 API。每月 100 万+ 免费 token。易与众多 AI 工具集成。

Keywords AI 关键词 人工智能 The best LLM monitoring platform. One format to call 200+ LLMs with 2 lines of code. 10,000 free requests every month and $0 for platform features! 最佳 LLM 监控平台。两行代码即可用统一格式调用 200+ 个 LLM。每月 1 万次免费请求，平台特性 $0 费用！

Langfuse 朗福斯 Open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications. Free forever plan includes 50k observations per month and all platform features. #opensource 帮助团队协作调试、分析并迭代其 LLM 应用的开源 LLM 工程平台。永久免费套餐含每月 5 万次观测与全部平台特性。#开源

LangWatch 浪表 A LLMOps platform helping AI teams measure, monitor, and optimize LLM applications for reliability, cost-efficiency, and performance. With a powerful DSPy component, we enable seamless collaboration between engineers and non-technical teams to fine-tune and productionize GenAI products. Free plan includes all platform features, 1k traces/month and 1 workflow DSPy optimizers. #opensource 帮助 AI 团队衡量、监控并优化 LLM 应用以实现可靠性、成本效率与性能的 LLMOps 平台。借助强大的 DSPy 组件，实现工程师与非技术团队间顺畅协作，以微调并产品化 GenAI 产品。免费套餐含全部平台特性、每月 1k 次追踪与 1 个工作流 DSPy 优化器。#开源

Latitude 纬度 Open-source (MIT) LLM observability and evaluation platform to trace, monitor, and evaluate AI agents in production. Free Starter plan includes 20K credits/month, 30-day data retention, and unlimited seats. #opensource MIT 许可的开源 LLM 观测与评估平台，用于追踪、监控并评估生产中的 AI 智能体。免费 Starter 套餐含每月 2 万积分、30 天数据保留与无限席位。#opensource

Lumenfall.ai AI media gateway providing unified access to leading image generation models via an OpenAI-compatible API. The platform itself is free to use with zero markup and no subscription fee. Inference costs for most models are billed at provider price, but FLUX.1 [schnell] FP8 is offered free forever with unlimited usage for registered users. Built-in failover and provider resilience included. AI 媒体网关，通过 OpenAI 兼容 API 统一访问领先的图像生成模型。平台本身免费使用、零加价、无订阅费。多数模型推理按提供商价格计费，但 FLUX.1 [schnell] FP8 对注册用户永久免费、无限使用。内置故障转移与提供商韧性。

Maxim 格言 An LLM evaluation and observability platform with agent simulation and prompt playground. Free tier offers 10k monthly logs, access to prompt playground, simulations and evaluations via BYOK. 带智能体模拟与提示词 playground 的 LLM 评估与观测平台。免费套餐提供每月 1 万条日志、提示词 playground、模拟与评估（通过 BYOK）。

Mediaworkbench.ai MediaWorkbench.ai offers 100,000 free words for Azure OpenAI, DeepSeek, and Google Gemini models, enabling users to access powerful tools for code generation, deep research, and image creation. MediaWorkbench.ai 为 Azure OpenAI、DeepSeek 与 Google Gemini 模型提供 10 万免费词，让用户访问代码生成、深度研究与图像创作等强大工具。

onomeo Onomeo gives you one key for dozens of AI models. Plug it right into tools like Cline, SillyTavern, or Open WebUI using standard OpenAI format. 35 models are completely free (60 requests / 5 hrs per user, pooled at 450 / 5 hrs across all users). Daily check-in credits let you use big models like Claude and GPT, up to a daily limit. Extra credits start at $5/month. We’re in open beta, so expect occasional instability. It’s great for casual use, but not ready to be a daily driver. Feedback is always welcome. Onomeo为您提供数十个AI模型的一个密钥。使用标准OpenAI格式直接连接到Cline、SillyTavern或Open WebUI等工具。35个模型完全免费（每个用户60请求/5小时，所有用户共享450/5小时）。每日签到积分让您可以使用像Claude和GPT这样的大模型，每天有上限。额外积分从每月5美元起。我们处于公开测试阶段，因此偶尔可能会有不稳定的情况。非常适合休闲使用，但还不适合作为日常驾驶。欢迎提供反馈。

OpenRouter 开放路由器 Provides various free AI models including DeepSeek R1, V3, Llama, and Moonshot AI. These models excel in natural language processing and are suitable for diverse development needs. Note that while these models are free to use, they are subject to rate limits. Additionally, OpenRouter offers paid models for more advanced requirements, for instance Claude, OpenAI, Grok, Gemini, and Nova. 提供多种免费 AI 模型，含 DeepSeek R1、V3、Llama 与 Moonshot AI。这些模型在自然语言处理上出色，适合多样开发需求。注意：模型虽免费，但受速率限制。另提供付费模型满足更高要求，如 Claude、OpenAI、Grok、Gemini 与 Nova。

Pollinations.AI 授粉.AI easy-to-use, free image generation AI with free API available. No signups or API keys required, and several option for integrating into a website or workflow. #opensource 易用、免费的 AI 图像生成，提供免费 API。无需注册或 API key，并有多种集成到网站或工作流的选项。#opensource

Portkey 门钥匙 Control panel for Gen AI apps featuring an observability suite & an AI gateway. Send & log up to 10,000 requests for free every month. 面向 Gen AI 应用的监控面板，含观测套件与 AI 网关。每月免费发送与记录最多 1 万次请求。

ReportGPT 报告GPT AI Powered Writing Assistant. The entire platform is free as long as you bring your own API key. AI 驱动的写作助手。只要你自带 API key，整个平台免费。

telemetry.dev 遥测.dev Observability for AI/LLM apps built on OpenTelemetry. Traces model calls and tool steps with tokens, cost, latency and errors; send OTLP over HTTP from any language or use the TypeScript SDKs. Free plan includes 10,000 spans/month, 7-day retention, 1 project and 2 seats, no credit card. 基于 OpenTelemetry 构建的 AI/LLM 应用可观测性。追踪模型调用与工具步骤，含 token、成本、延迟与错误；可从任意语言通过 HTTP 发送 OTLP 或使用 TypeScript SDK。免费套餐含每月 1 万 span、7 天保留、1 个项目与 2 个席位，无需信用卡。

Transcript LOL 文字记录哈哈 Converts audio or video to text using AI. Generates summaries and other insights using LLMs. The free tier includes 2 transcriptions per day. You can upload files, record voice notes, or use links from YouTube, Instagram etc. The free version also supports WhatsApp, Telegram and importing files directly from cloud storages - Google Drive, Dropbox, Box and OneDrive. No API key needed. Sign up and ready to use. Also has apps for mobiles, desktops and chromebooks. 用 AI 将音频或视频转为文本。用 LLM 生成摘要与其他洞察。免费套餐每天 2 次转录。可上传文件、录制语音笔记，或使用 YouTube、Instagram 等链接。免费版还支持 WhatsApp、Telegram 并直接从云存储（Google Drive、Dropbox、Box、OneDrive）导入文件。无需 API key。注册即用。另提供移动、桌面与 Chromebook 应用。

Zenable 泽纳布尔 Instantly auto-fix outputs from tools like Cursor, Windsurf, and Copilot to meet your company's quality and compliance standards using guardrails built with Policy as Code. The free tier includes 100 tools calls per day to the MCP server and 25 free automated pull request reviews per day via the GitHub App. 使用以策略即代码（Policy as Code）构建的护栏，即时自动修复 Cursor、Windsurf、Copilot 等工具的输出，使其符合公司的质量与合规标准。免费套餐每天对 MCP 服务器 100 次工具调用，以及通过 GitHub App 每天 25 次免费自动化 PR 评审。

CDN and Protection

bootstrapcdn.com CDN for bootstrap, bootswatch and fontawesome.io 面向 bootstrap、bootswatch 与 fontawesome.io 的 CDN。

CacheFly 缓存飞 Up to 5 TB per month of Free CDN traffic, 19 Core PoPs , 1 Domain and Universal SSL. 每月最多 5TB 免费 CDN 流量、19 个核心 PoP（接入点）、1 个域名与通用 SSL。

cdnjs.com Simple. Fast. Reliable. Content delivery at its finest. cdnjs is a free and open-source CDN service trusted by over 11% of all websites, powered by Cloudflare. 简单、快速、可靠。极佳的内容分发。cdnjs 是免费开源 CDN 服务，被超过 11% 的网站信任，由 Cloudflare 提供动力。

developers.google.com 开发者.google.com The Google Hosted Libraries is a content distribution network for the most popular Open Source JavaScript libraries Google Hosted Libraries 是面向最流行开源 JavaScript 库的内容分发网络。

Gcore 格芯 Global content delivery network, 1 TB and 1 million requests per month free and free DNS hosting 全球内容分发网络，每月 1TB 与 100 万次请求免费，并免费 DNS 托管。

jsdelivr.com A free, fast, and reliable open-source CDN. Supports npm, GitHub, WordPress, Deno, and more. 免费、快速、可靠的开源 CDN。支持 npm、GitHub、WordPress、Deno 等。

Microsoft Ajax 微软Ajax The Microsoft Ajax CDN hosts popular third-party JavaScript libraries such as jQuery and enables you to easily add them to your Web application Microsoft Ajax CDN 托管 jQuery 等流行第三方 JavaScript 库，让你轻松添加到 Web 应用。

Namecheap Supersonic 名称cheap Supersonic Free DDoS protection 免费 DDoS 防护。

ovh.ie Free DDoS protection and SSL certificate 免费 DDoS 防护与 SSL 证书。

PromoProxy 促销代理 Free cloud Secure Web Gateway. Free plan includes up to 5 users and 1 GB per day. 免费的云安全 Web 网关。免费套餐含最多 5 名用户与每天 1GB。

raw.githack.com A modern replacement of **rawgit.com** which simply hosts file using Cloudflare **rawgit.com** 的现代替代，仅用 Cloudflare 托管文件。

Skypack 天空包 The 100% Native ES Module JavaScript CDN. Free for 1 million requests per domain per month. 100% 原生 ES Module JavaScript CDN。每域名每月 100 万次请求免费。

statically.io 静态地.io CDN for Git repos (GitHub, GitLab, Bitbucket), WordPress-related assets, and images 面向 Git 仓库（GitHub、GitLab、Bitbucket）、WordPress 相关资源与图像的 CDN。

Stellate 星状 Stellate is a blazing-fast, reliable CDN for your GraphQL API and free for two services. Stellate 是为你的 GraphQL API 打造的极速、可靠 CDN，两个服务免费。

toranproxy.com Proxy for Packagist and GitHub. Never fail CD. Free for personal use, one developer, no support 面向 Packagist 与 GitHub 的代理。永不失败的 CD。个人使用、单一开发者免费，无支持。

UNPKG 联合国PKG CDN for everything on npm 面向 npm 上一切内容的 CDN。

weserv 韦塞夫 An image cache & resize service. Manipulate images on the fly with a worldwide cache. 图像缓存与缩放服务。用全球缓存即时处理图像。

PaaS

ampt.dev Ampt lets teams build, deploy, and scale JavaScript apps on AWS without complicated configs or managing infrastructure. Free Preview plan includes 500 invocations hourly, 2,500 invocations daily and 50,000 invocations monthly. Custom domains are allowed only in the paid plans. Ampt 让团队无需复杂配置或管理基础设施，即可在 AWS 上构建、部署与扩展 JavaScript 应用。免费 Preview 套餐含每小时 500 次调用、每日 2500 次调用与每月 5 万次调用。自定义域名仅付费套餐支持。

anvil.works 铁砧作品 Web app development with nothing but Python. Free tier with unlimited apps and 30-second timeouts. 仅用 Python 开发 Web 应用。免费套餐含无限应用与 30 秒超时。

Apply.build 应用.build Build and deploy your GitHub app for free with 0.5 vCPUs / 512 MiB RAM, European servers, automatic firewall, real-time performance metrics. Run Node.js, Python, Go, Java, static sites, microservices, and more. 免费构建并部署你的 GitHub 应用，0.5 vCPU / 512 MiB 内存、欧洲服务器、自动防火墙、实时性能指标。运行 Node.js、Python、Go、Java、静态站点、微服务等。

appwrite 应用程序写入 Unlimited projects with no project pausing (supports websockets) and authentication service. 1 Database, 3 Buckets, 5 Functions per project in free tier. 无限项目、无项目暂停（支持 websockets）与认证服务。免费套餐每项目 1 个数据库、3 个存储桶、5 个函数。

Clever Cloud 聪明云 European PaaS with automated deployments, autoscaling, managed databases, and Git-based workflows. Includes €20 free credits at signup, a limited DEV plan with free MySQL and PostgreSQL databases, and free allowances for services like Heptapod and FS Buckets. 欧洲 PaaS，含自动部署、自动扩缩、托管数据库与基于 Git 的工作流。注册赠送 €20 免费额度、含免费 MySQL 与 PostgreSQL 数据库的有限 DEV 套餐，以及 Heptapod、FS Buckets 等服务的免费额度。

Choreo 舞蹈 AI-native internal developer platform as a service. The free tier includes up to 5 components and $100 credits per month. AI 原生的内部开发者平台即服务。免费套餐含最多 5 个组件与每月 100 美元额度。

codenameone.com Open source, cross-platform, mobile app development toolchain for Java/Kotlin developers. Free for commercial use with an unlimited number of projects 面向 Java/Kotlin 开发者的开源、跨平台移动应用开发工具链。商业使用免费，项目数量无限。

Cohesivity 凝聚力 Headless backend and services, purpose built for AI agents. Includes hosting, databases, storage, LLMs, and third-party APIs. Agentic signup. Free tier includes 10 projects, 100K edge requests, 10 GB object storage, 100 emails, and 5 USD/month in credits for AI and search. 无头（headless）后端与服务，专为 AI 智能体打造。含托管、数据库、存储、LLM 与第三方 API。智能体式注册。免费套餐含 10 个项目、10 万边缘请求、10GB 对象存储、100 封邮件，以及每月 5 美元 AI 与搜索额度。

Daestro 达埃斯特罗 Run compute jobs across Cloud Providers & On-Prem. The free tier includes up to 10 concurrent job runs, 2 compute spawns, self-hosted compute, 1 cloud provider, 1 container registry and 1 cron job. 跨云服务商与本地运行计算任务。免费套餐含最多 10 个并发任务运行、2 个计算实例生成、自托管计算、1 个云服务商、1 个容器注册表与 1 个 cron 任务。

Deno Deploy 德诺部署 Distributed system that runs JavaScript, TypeScript, and WebAssembly at the edge worldwide. The free tier includes 100,000 requests per day and 100 GiB data transfers per month. 在全球边缘运行 JavaScript、TypeScript 与 WebAssembly 的分布式系统。免费套餐含每天 10 万次请求与每月 100 GiB 数据传输。

Deplexo Developer-focused PaaS for deploying and hosting applications with Git-based deployments, custom domains, automatic HTTPS, and Dockerfile support. Run Node.js, Python, Go, Java, Rust, PHP, static sites, and more. The free tier includes 1 app with 0.25 vCPU, 128 MB RAM, 250 MB disk, and 100 GB bandwidth. 面向开发者的PaaS平台，用于部署和托管基于Git的部署、自定义域名、自动HTTPS和Dockerfile支持的应用程序。支持运行Node.js、Python、Go、Java、Rust、PHP、静态网站等。免费层包括1个应用程序，0.25 vCPU，128 MB RAM，250 MB磁盘空间和100 GB带宽。

domcloud.co Linux hosting service that provides CI/CD with GitHub, SSH, and MariaDB/Postgres database. The free version has 1 GB storage and 1 GB network/month limit and is limited to a free domain. 提供 GitHub、SSH 与 MariaDB/Postgres 数据库 CI/CD 的 Linux 托管服务。免费版有 1GB 存储与每月 1GB 网络限制，限于免费域名。

encore.dev 安可开发版 Backend framework using static analysis to provide automatic infrastructure, boilerplate-free code, and more. Includes free cloud hosting for hobby projects. 后端框架，使用静态分析提供自动化基础设施、无样板代码等。含面向爱好项目的免费云托管。

faable.com Deploy apps with framework auto-detection for Python and Node.js. The free tier includes one 0.5 CPU / 1 GB RAM instance per project, 10 GB bandwidth, 10 successful deploys per day, automatic SSL and a built-in WAF, plus OAuth 2.0 / OIDC authentication. Apps sleep after 2 hours without traffic. European servers. 使用框架自动检测部署 Python 和 Node.js 应用。免费层包括每个项目一个0.5 CPU / 1 GB RAM的实例，10 GB 带宽，每天10次成功部署，自动SSL和内置WAF，以及OAuth 2.0 / OIDC身份验证。应用在2小时无流量后将进入休眠状态。欧洲服务器。

flightcontrol.dev 飞行控制.dev Deploy web services, databases, and more on your own AWS account with a Git push style workflow. Free tier for users with 1 developer on personal GitHub repos. AWS costs are billed through AWS, but you can use credits and the AWS free tier. 用 Git push 式工作流在你自己的 AWS 账号上部署 Web 服务、数据库等。个人 GitHub 仓库、单一开发者的用户免费。AWS 成本由 AWS 计费，但可用额度与 AWS 免费套餐。

gigalixir.com Gigalixir provides one free instance that never sleeps and a free-tier PostgreSQL database limited to 2 connections, 10, 000 rows and no backups for Elixir/Phoenix apps. Gigalixir 为 Elixir/Phoenix 应用提供永不清睡的免费实例与限制为 2 连接、1 万行、无备份的免费套餐 PostgreSQL 数据库。

Northflank 北翼 Build and deploy microservices, jobs, and managed databases with a powerful UI, API & CLI. Seamlessly scale containers from version control and external Docker registries. The free tier includes two services, two cron jobs and 1 database. 用强大的 UI、API 与 CLI 构建并部署微服务、任务与托管数据库。从容从版本控制与外部 Docker 注册表扩展容器。免费套餐含 2 个服务、2 个 cron 任务与 1 个数据库。

Ownkube 乌恩库贝 Free single-node k3s in your own AWS account, run apps, databases, workers with a git push. Use your AWS credits at peak efficiency. 在你自己的 AWS 账号中免费运行单节点 k3s，通过 git push 运行应用、数据库、工作节点。以最高效率使用你的 AWS 额度。

pipedream.com Pipedream.com An integration platform built for developers. Develop any workflow based on any trigger. Workflows are code you can run for free. No server or cloud resources to manage. 为开发者打造的一体化平台。基于任意触发器开发任意工作流。工作流是你可免费运行的代码。无需管理服务器或云资源。

pythonanywhere.com Cloud Python app hosting. Beginner account is free, 1 Python web application at your-username.pythonanywhere.com domain, 512 MB private file storage, one MySQL database 云 Python 应用托管。初学者账号免费，your-username.pythonanywhere.com 域名下 1 个 Python Web 应用、512MB 私有文件存储、1 个 MySQL 数据库。

Runsite 运行站点 European PaaS with automated deployments from GitHub for web services or static sites (1 web 0.1 vCPU/256 MB free), managed PostgreSQL and Valkey(Redis) (30 days for free), Transactional Email (3,000 emails/month free), S3 compatible storage (5 GB/free), all what you need for start your web site. Servers located in Germany. 欧洲 PaaS，可从 GitHub 进行自动部署，用于 Web 服务或静态站点（1 个 Web 0.1 vCPU/256 MB 免费）、托管 PostgreSQL 和 Valkey(Redis)（免费 30 天）、事务性电子邮件（每月免费 3,000 封电子邮件）、S3 兼容存储（5 GB/免费），这一切都是您启动网站所需的一切。服务器位于德国。

SnapDeploy Docker containers or GitHub repos, hosted on AWS. Free tier: up to 4 containers, 100 running hours a month, 10 deploys a day. Sleeps after 15 minutes idle and wakes on the next request. No credit card. 托管在AWS上的Docker容器或GitHub仓库。免费层：每月最多4个容器，100个运行小时，每天最多10次部署。闲置15分钟后休眠，下次请求时唤醒。无需信用卡。

Val Town 瓦尔镇 Collaborative TypeScript/JavaScript serverless platform for scripts, HTTP endpoints, and cron jobs. Free plan includes unlimited public vals, 15-minute cron intervals, 1-minute wall-clock time per run, and 3-day log retention. No custom domains on free. 用于脚本、HTTP 端点与 cron 任务的协做式 TypeScript/JavaScript 无服务器平台。免费套餐含无限公开 vals、15 分钟 cron 间隔、每次运行 1 分钟墙钟时间与 3 天日志保留。免费不支持自定义域名。

WunderGraph 奇妙图谱 An open-source platform that allows you to quickly build, ship and manage modern APIs. Built-in CI/CD, GitHub integration, and automatic HTTPS. Up to 3 projects, 1GB egress, 300 minutes of build time per month on the free plan 让你快速构建、发布并管理现代 API 的开源平台。内置 CI/CD、GitHub 集成与自动 HTTPS。免费套餐最多 3 个项目、1GB 出站、每月 300 分钟构建时间。

YepCode 是码 All-in-one platform to connect APIs and services in a serverless environment. It brings all the agility and benefits of NoCode tools but with all the power of using programming languages. The free tier includes 1.000 yeps. 在无服务器环境中连接 API 与服务的一体化平台。带来 NoCode 工具的全部敏捷与优势，却拥有编程语言的全部能力。免费套餐含 1000 个 yeps。

BaaS

Activepieces 活跃作品 Build automation flows to connect several apps together in your app's backend. For example, send a Slack message or add a Google Sheet row when an event fires in your app. Free up to 5,000 tasks per month. 在你的应用后端构建自动化流程连接多个应用。例如，当应用内触发事件时发送 Slack 消息或新增 Google Sheet 行。免费每月最多 5000 个任务。

back4app.com Back4App is an easy-to-use, flexible and scalable backend based on Parse Platform. Back4App 是基于 Parse Platform、易用、灵活且可扩展的后端。

backendless.com Mobile and Web Baas, with 1 GB file storage free, push notifications of 50,000/month, and 1000 data objects in the table. 移动与 Web 后端即服务，免费 1GB 文件存储、每月 5 万次推送通知、表中 1000 个数据对象。

connectycube.com Unlimited chat messages, p2p voice & video calls, files attachments and push notifications. Free for apps up to 1000 users. 无限聊天消息、P2P 语音与视频通话、文件附件与推送通知。最多 1000 用户的应用免费。

convex.dev 凸面.dev Reactive backend as a service, hosting your data (documents with relationships & serializable ACID transactions), serverless functions, and WebSockets to stream updates to various clients. Free for small projects - up to 1M records, 5M monthly function calls. 响应式后端即服务，托管你的数据（含关系与可序列化 ACID 事务的文档）、无服务器函数，以及向各客户端流式更新的 WebSockets。小项目免费——最多 100 万条记录、每月 500 万次函数调用。

ETLR Define, version, and deploy automation scripts using YAML. A developer-first alternative to drag-and-drop tools. Can be used for scheduled tasks, AI agents, and infrastructure monitoring. Free tier includes 100 credits/month. 用 YAML 定义、版本化并部署自动化脚本。以开发者为先、替代拖拽工具。可用于定时任务、AI 智能体与基础设施监控。免费套餐含每月 100 额度。

Flutter Flow 颤振流 Build your Flutter App UI without writing a single line of code. Also has a Firebase integration. The free plan includes full access to UI Builder and Free templates. 无需编写一行代码即可构建你的 Flutter 应用 UI。也集成 Firebase。免费套餐含 UI Builder 与免费模板的完全访问。

getstream.io 获取流io Build scalable In-App Chat, Messaging, Video and audio, and Feeds in a few hours instead of weeks 用数小时而非数周构建可扩展的应用内聊天、消息、音视频与动态流（Feeds）。

IFTTT IFTT Automate your favorite apps and devices. Free 2 Applets 自动化你喜爱的应用与设备。免费 2 个 Applet。

Integrately 综合地 Automate tedious tasks with a single click. Free 100 Tasks, 15 Minute 一键自动化繁琐任务。免费 100 个任务、15 分钟。

LeanCloud 精益云 Mobile backend. 1GB of data storage, 256MB instance, 3K API requests/day, and 10K pushes/day are free. (API is very similar to Parse Platform) 移动后端。1GB 数据存储、256MB 实例、每天 3K API 请求、每天 1 万次推送免费。（API 与 Parse Platform 非常相似）

nhost.io Serverless backend for web and mobile apps. The free plan includes PostgreSQL, GraphQL (Hasura), Authentication, Storage, and Serverless Functions. 面向 Web 与移动应用的无服务器后端。免费套餐含 PostgreSQL、GraphQL（Hasura）、认证、存储与无服务器函数。

onesignal.com Unlimited free push notifications. 10,000 email sends per month, with unlimited contacts and access to Auto Warm Up. 无限免费推送通知。每月 1 万封邮件发送，无限联系人并可使用自动预热（Auto Warm Up）。

paraio.com Backend service API with flexible authentication, full-text search and caching. Free for one app, 1GB of app data. 具灵活认证、全文搜索与缓存的后端服务 API。1 个应用、1GB 应用数据免费。

pubnub.com Free push notifications for up to 1 million messages/month and 100 active daily devices 每月最多 100 万条消息、100 个每日活跃设备的免费推送通知。

pusher.com Pusher.com Free, unlimited push notifications for 2000 monthly active users. A single API for iOS and Android devices. 面向 2000 月活用户的无限免费推送通知。iOS 与 Android 设备的单一 API。

simperium.com Move data everywhere instantly and automatically, multi-platform, unlimited sending and storage of structured data, max. 2,500 users/month 即时自动随处移动数据，跨平台，结构化数据的无限发送与存储，最多每月 2500 用户。

snill.ai 斯尼尔.ai AI no-code platform that turns a plain-language description into a complete business system with a relational database, dashboards, workflows, REST API and webhooks. Free plan for solo operators includes 2 apps, 1,000 records and 10 AI requests/day. AI 无代码平台，将纯语言描述转化为含关系数据库、仪表盘、工作流、REST API 与 Webhooks 的完整业务系统。单人运营者免费套餐含 2 个应用、1000 条记录与每天 10 次 AI 请求。

Supabase 苏帕贝斯 The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage. 构建后端的开源 Firebase 替代品。免费套餐提供认证、实时数据库与对象存储。

tyk.io API management with authentication, quotas, monitoring and analytics. Free cloud offering 带认证、配额、监控与分析的 API 管理。免费云方案。

zapier.com Connect the apps you use to automate tasks. Five zaps every 15 minutes and 100 tasks/month 连接你使用的应用以自动化任务。每 15 分钟 5 个 zap、每月 100 个任务。

Low-code Platform

appsmith 应用史密斯 Low code project to build admin panels, internal tools, and dashboards. Integrates with 15+ databases and any API. 用于构建管理面板、内部工具与仪表盘的低代码项目。集成 15+ 数据库与任意 API。

BudiBase 布迪基地 Budibase is an open-source low-code platform for creating internal apps in minutes. Supports PostgreSQL, MySQL, MSSQL, MongoDB, Rest API, Docker, K8s Budibase 是开源低代码平台，数分钟创建内部应用。支持 PostgreSQL、MySQL、MSSQL、MongoDB、Rest API、Docker、K8s。

Clappia 克拉皮亚 A low-code platform designed for building business process applications with customizable mobile and web apps. Offers a drag-and-drop interface, features like Offline Support, real-time location tracking and integration with various third-party services 专为构建业务流程应用设计的低代码平台，含可定制的移动与 Web 应用。提供拖拽界面，以及离线支持、实时位置追踪与各类第三方服务集成等特性。

lil'bots 小机器人 write and run scripts online utilizing free built-in APIs like OpenAI, Anthropic, Firecrawl and others. Great for building AI agents / internal tooling and sharing with team. Free-tier includes full access to APIs, AI coding assistant and 10,000 execution credits / month. 在线编写并运行脚本，使用 OpenAI、Anthropic、Firecrawl 等内置免费 API。非常适合构建 AI 智能体/内部工具并与团队分享。免费套餐含 API 完全访问、AI 编程助手与每月 1 万执行额度。

manubes 马努贝斯 Powerful no-code cloud platform with a focus on industrial production management. Free for one user with 1 million workflow activities a month (also available in german). 专注工业生产管理的强大无代码云平台。单一用户、每月 100 万次工作流活动免费（也提供德语版）。

Mendix 门迪克斯 Rapid Application Development for Enterprises, unlimited accessible sandbox environments supporting total users, 0.5 GB storage and 1 GB RAM per app. Also, Studio and Studio Pro IDEs are allowed in the free tier. 面向企业的快速应用开发，无限可访问沙箱环境支持总用户数、每应用 0.5GB 存储与 1GB RAM。免费套餐也允许 Studio 与 Studio Pro IDE。

outsystems.com Enterprise web development PaaS for on-premise or cloud, free "personal environment" offering allows for unlimited code and up to 1 GB database 面向本地或云的企业级 Web 开发 PaaS，免费"个人环境"提供无限代码与最多 1GB 数据库。

ReTool 重新工具 Low-code platform for building internal applications. Retool is highly hackable. If you can write it with JavaScript and an API, you can make it in Retool. The free tier allows up to five users per month, unlimited apps and API connections. 用于构建内部应用的低代码平台。Retool 高度可 hack。若能用 JavaScript 与 API 写出来，就能在 Retool 中做出。免费套餐每月最多 5 名用户、无限应用与 API 连接。

ToolJet 工具喷射器 Extensible low-code framework for building business applications. Connect to databases, cloud storages, GraphQL, API endpoints, Airtable, etc., and build apps using drag-and-drop application builder. 用于构建业务应用的可扩展低代码框架。连接数据库、云存储、GraphQL、API 端点、Airtable 等，用拖拽应用构建器构建应用。

UI Bakery UI面包店 Low-code platform that enables faster building of custom web applications. Supports building UI using drag and drop with a high level of customization through JavaScript, Python, and SQL. Available as both cloud and self-hosted solutions. Free for up to 5 users. 加速构建自定义 Web 应用的低代码平台。支持用 JavaScript、Python 与 SQL 以拖拽方式构建 UI 并高度定制。提供云与自托管两种方案。最多 5 名用户免费。

Web Hosting

Alwaysdata 始终数据 1 GB free web hosting with support for MySQL, PostgreSQL, RabbitMQ, .NET, Deno, Elixir, Go, Java, Lua, Node.js, PHP, Python, Ruby, Rust. Custom web servers, access via FTP, WebDAV and SSH. Mailbox, mailing list and app installer included. No custom domain on free plan. 1GB 免费 Web 托管，支持 MySQL、PostgreSQL、RabbitMQ、.NET、Deno、Elixir、Go、Java、Lua、Node.js、PHP、Python、Ruby、Rust。自定义 Web 服务器，通过 FTP、WebDAV 与 SSH 访问。含邮箱、邮件列表与应用安装器。免费套餐无自定义域名。

Awardspace.com Free web hosting + a free short domain, PHP, MySQL, App Installer, Email Sending & No Ads. 免费 Web 托管 + 免费短域名、PHP、MySQL、应用安装器、邮件发送且无广告。

boomurl 布穆尔 Publish static sites (HTML/Markdown/images/PDF or a whole folder) to an instant HTTPS URL with no account; free tier shows a small banner. Custom domains supported. 将静态站点（HTML/Markdown/图像/PDF 或整个文件夹）发布到即时 HTTPS URL，无需账号；免费套餐显示小横幅。支持自定义域名。

Bubble 气泡 Visual programming to build web and mobile apps without code, free with Bubble branding. 无需代码即可构建 Web 与移动应用的视觉化编程，带 Bubble 品牌免费。

dAppling Network d应用网络 Decentralized web hosting platform for Web3 frontends focusing on increasing uptime and security and providing an additional access point for users. 面向 Web3 前端的去中心化 Web 托管平台，专注提升可用性与安全性，并为用户提供额外接入点。

DigitalOcean 数字海洋 Build and deploy three static sites for free on the App Platform Starter tier. 在 App Platform Starter 套餐上免费构建并部署三个静态站点。

FreeFlarum 自由弗拉鲁姆 Community-powered free Flarum hosting for up to 250 users (donate to remove the watermark from the footer). 社区驱动的免费 Flarum 托管，最多 250 用户（捐赠可去除页脚水印）。

Harvis.dev Static site hosting via CLI (`npx harvis`) with no config files or build step. Includes free subdomain, free form submissions collections, GitHub Actions integration, CloudFlare CDN, free SSL. 通过CLI（`npx harvis`）进行静态站点托管，无需配置文件或构建步骤。包括免费子域名、免费表单提交收集、GitHub Actions集成、CloudFlare CDN、免费SSL。

Koyeb Serverless platform with a free Hobby plan providing 550 free compute hours/month (512 MB RAM Free tier), 1 free PostgreSQL database, and custom domain SSL. 无服务器平台，提供免费Hobby计划，每月提供550个免费计算小时（512 MB RAM），1个免费PostgreSQL数据库和自定义域名SSL。

MDB GO MDBGO Free hosting for one project with two weeks Container TTL, 500 MB RAM per project, SFTP - 1G disk space. 一个项目免费托管，容器 TTL 两周、每项目 500MB RAM、SFTP - 1G 磁盘空间。

Mirin 味醂 Website platform for developer-built React, Vue, or Svelte component sites with visual editing, forms, analytics, and global CDN hosting. Free tier includes 1 site with unlimited pages and submissions. 面向开发者用 React、Vue 或 Svelte 组件站点、带可视化编辑、表单、分析与全球 CDN 托管的网站平台。免费套餐含 1 个站点、无限页面与提交。

Neocities 新城市 Static, 1 GB free storage with 200 GB Bandwidth. 静态，1GB 免费存储与 200GB 带宽。

Netlify 网络化 Builds, deploys and hosts static site/app free for 300 credits/month (equals 30 GB bandwidth). 构建、部署并托管静态站点/应用，每月 300 额度（等于 30GB 带宽）免费。

PandaStack 熊猫栈 An eco-system for developers includes web hosting in different formats (static web hosting, container based web hosting, wordpress and so many other managed apps available in couple of clicks ). One free web hosting (static or containered) and one free database with 100GB Bandwidth and 300 Build mins/month. 面向开发者的生态，含多种格式 Web 托管（静态、基于容器的 Web 托管、WordPress 及众多一键托管应用）。1 个免费 Web 托管（静态或容器）与 1 个免费数据库，含 100GB 带宽与每月 300 构建分钟。

pantheon.io 万神殿io Drupal and WordPress hosting, automated DevOps, and scalable infrastructure. Free for developers and agencies. No custom domain. Drupal 与 WordPress 托管、自动化 DevOps 与可扩展基础设施。开发者与机构免费。无自定义域名。

Qoddi 科迪 PaaS service similar to Heroku with a developer-centric approach and all-inclusive features. Free tier for static assets, staging, and developer apps. 类似 Heroku、以开发者为中心、功能全包（all-inclusive）的 PaaS 服务。静态资源、预发环境与开发者应用免费套餐。

readthedocs.org Free documentation hosting with versioning, PDF generation, and more 免费文档托管，含版本管理、PDF 生成等。

render.com 渲染网 Unified cloud to build and run apps and sites with free SSL, a global CDN, private networks, auto-deploys from Git, and completely free plans for web services, databases, and static web pages. 统一云，构建并运行应用与站点，免费 SSL、全球 CDN、私有网络、从 Git 自动部署，并为 Web 服务、数据库与静态网页提供完全免费套餐。

Revdoku 雷夫多库 Publish files, reports, custom microsites right from ChatGPT, Claude, Codex and other AI agents as public or password-protected websites. Free tier: 2GB storage, 2 live sites/apps, 1 database (25 MB), 3 AI connections, 1k files/bucket (100 MB/file), basic analytics. 从 ChatGPT、Claude、Codex 及其他 AI 智能体直接发布文件、报告、自定义微站为公开或密码保护的网站。免费套餐：2GB 存储、2 个在线站点/应用、1 个数据库（25MB）、3 个 AI 连接、每桶 1k 文件（每文件 100MB）、基础分析。

ShipStatic 船舶静态 Static hosting your AI agent can drive itself: `npx @shipstatic/ship ./dist` and the site is live, with no install, no signup, no repo, no build. MCP, SDK and API too. Free accounts keep sites permanently with automatic HTTPS, global edge delivery and unmetered bandwidth; custom domains are paid. 你的 AI 智能体可自行驱动的静态托管：`npx @shipstatic/ship ./dist` 站点即上线，无需安装、注册、仓库或构建。也提供 MCP、SDK 与 API。免费账号永久保留站点，含自动 HTTPS、全球边缘分发与不计量带宽；自定义域名付费。

SourceForge 来源锻造 Find, Create, and Publish Open Source software for free 免费查找、创建并发布开源软件。

surge.sh 浪涌 Static web publishing for Front-End developers. Unlimited sites with custom domain support 面向前端开发者的静态 Web 发布。无限站点并支持自定义域名。

tilda.cc 蒂尔达.cc One site, 50 pages, 50 MB storage, only the main pre-defined blocks among 170+ available, no fonts, no favicon, and no custom domain 1 个站点、50 页、50MB 存储，仅 170+ 可用区块中的主预定义区块，无字体、无 favicon、无自定义域名。

Vercel 韦尔塞尔 Build, deploy, and host web apps with free SSL, global CDN, and unique Preview URLs each time you `git push`. Perfect for Next.js and other Static Site Generators. 构建、部署并托管 Web 应用，免费 SSL、全球 CDN，每次 `git push` 提供专属预览 URL。非常适合 Next.js 与其他静态站点生成器。

Versoly 韦尔索利 SaaS-focused website builder - unlimited websites, 70+ blocks, five templates, custom CSS, favicon, SEO and forms. No custom domain. 专注 SaaS 的网站构建器——无限网站、70+ 区块、5 个模板、自定义 CSS、favicon、SEO 与表单。无自定义域名。

Stormkit Self-hostable Vercel alternative for building, hosting, and deploying modern frontend and JavaScript applications. Free plan includes 1 app, 50 GB bandwidth, unlimited custom domains, and free SSL. 自托管Vercel替代方案，用于构建、托管和部署现代前端和JavaScript应用程序。免费计划包括1个应用程序，50 GB带宽，无限自定义域名和免费SSL。

DNS

1.1.1.1 Free public DNS Resolver, which is fast and secure (encrypt your DNS query), provided by Cloudflare. Useful to bypass your internet provider's DNS blocking, prevent DNS query spying, and to block adult & malware content. It can also be used via API. Note: Just a DNS resolver, not a DNS hoster. Cloudflare 提供的免费公共 DNS 解析器，快速且安全（加密你的 DNS 查询）。可用于绕过你的网络提供商的 DNS 封锁、防止 DNS 查询被窥探，并屏蔽成人内容与恶意软件。也可通过 API 使用。注意：仅为 DNS 解析器，非 DNS 托管商。

1984.is Free DNS service with API and lots of other free DNS features included. 免费 DNS 服务，含 API 与众多其他免费 DNS 特性。

cloudns.net 云网 Free DNS hosting up to 1 domain with 50 records 最多 1 个域名、50 条记录的免费 DNS 托管。

deSEC 去SEC Free DNS hosting with API support, designed with security in mind. Runs on open-source software and is supported by SSE. 以安全为设计理念的免费 DNS 托管，支持 API。运行于开源软件，由 SSE 支持。

dns.he.net 域名解析网 Free DNS hosting service with Dynamic DNS Support 支持动态 DNS 的免费 DNS 托管服务。

dnspod.com Free DNS hosting. 免费 DNS 托管。

duckdns.org Free DDNS with up to 5 domains on the free tier. With configuration guides for various setups. 免费 DDNS（动态 DNS），免费套餐最多 5 个域名。含各类设置的配置指南。

Dynv6.com 动态6.com Free DDNS service with API support and management of a lot of dns record types (like CNAME, MX, SPF, SRV, TXT and others). 支持 API、可管理众多 DNS 记录类型（如 CNAME、MX、SPF、SRV、TXT 等）的免费 DDNS 服务。

freedns.afraid.org Free DNS hosting. Also, provide free subdomains based on numerous public user contributed domains. Get free subdomains from the "Subdomains" menu after signing up. 免费 DNS 托管。也提供基于众多用户贡献域名的免费子域。注册后从"Subdomains"菜单获取免费子域。

Glauca 格劳卡 Free DNS hosting for up to 3 domains and DNSSEC support 最多 3 个域名、支持 DNSSEC 的免费 DNS 托管。

Hetzner 赫茨纳 Free DNS hosting from Hetzner with API support. Hetzner 提供的免费 DNS 托管，支持 API。

huaweicloud.com 华为云网 Free DNS hosting by Huawei 华为提供的免费 DNS 托管。

LocalCert 本地证书 Free `.localcert.net` subdomains compatible with public CAs for use with-in private networks 兼容公共 CA、可在私有网络内使用的免费 `.localcert.net` 子域。

luadns.com Free DNS hosting, three domains, all features with reasonable limits 免费 DNS 托管，三个域名，含合理限制的全部特性。

namecheap.com Free DNS. No limit on the number of domains 免费 DNS。域名数量无限制。

nextdns.io 下一个DNS.io DNS-based firewall, 300K free queries monthly 基于 DNS 的防火墙，每月 30 万次免费查询。

noip.at 诺伊普 Free DDNS service without registration, tracking, logging or advertising. No limit to domains. 免注册、无追踪、无日志记录、无广告的免费 DDNS 服务。域名数量无限制。

noip 诺伊普 a dynamic DNS service that allows up to 3 hostnames free with confirmation every 30 days 动态 DNS 服务，免费最多 3 个主机名，每 30 天确认一次。

sslip.io Free DNS service that when queried with a hostname with an embedded IP address returns that IP address. 免费 DNS 服务，当查询嵌入 IP 地址的主机名时返回该 IP 地址。

zilore.com Free DNS hosting for 5 domains. 5 个域名的免费 DNS 托管。

zoneedit.com Free DNS hosting with Dynamic DNS Support. 支持动态 DNS 的免费 DNS 托管。

Zonomi 佐诺米 Free DNS hosting service with instant DNS propagation. Free plan: 1 DNS zone (domain name) with up to 10 DNS records. 即时 DNS 传播的免费 DNS 托管服务。免费套餐：1 个 DNS 区域（域名），最多 10 条 DNS 记录。

Domain

DigitalPlat 数字平台 Free subdomains. 免费子域。

DNSHE Free subdomain registration across multiple domain suffixes, with custom nameserver support. 跨多域名后缀的免费子域注册，支持自定义 nameserver。

isroot.in Free isroot.in subdomains. 免费 isroot.in 子域。

pp.ua Free pp.ua subdomains. 免费 pp.ua 子域。

IaaS

4EVERLAND 4爱宝乐园 Compatible with AWS S3 - APIs, interface operations, CLI, and other upload methods, upload and store files from the IPFS and Arweave networks in a safe, convenient, and efficient manner. Registered users can get 6 GB of IPFS storage and 300MB of Arweave storage for free. Any Arweave file uploads smaller than 150 KB are free. 兼容 AWS S3 API、接口操作、CLI 及其他上传方式，以安全、便捷、高效的方式从 IPFS 与 Arweave 网络上传并存储文件。注册用户可免费获得 6GB IPFS 存储与 300MB Arweave 存储。小于 150KB 的 Arweave 文件上传均免费。

backblaze.com Backblaze B2 cloud storage. Free 10 GB (Amazon S3-like) object storage for unlimited time Backblaze B2 云存储。无限期免费 10GB（类 Amazon S3）对象存储。

filebase.com 文件库.com S3 Compatible Object Storage Powered by Blockchain. 5 GB free storage for an unlimited duration. 由区块链驱动、兼容 S3 的对象存储。5GB 免费存储，无限期。

Modal 莫代尔 AI-driven IaaS with generous compute, storage; offers $30 (might be limited to $5 on certain accounts) of free monthly credits AI 驱动的 IaaS，含充裕的计算与存储；提供每月 30 美元（某些账户可能限 5 美元）免费额度。

Managed Data Services

8base.com 8base is a full-stack low-code development platform built for JavaScript developers built on top of MySQL and GraphQL and serverless backend-as-a-service. It allows you to start building web applications quickly using a UI app builder and scale quickly, The Free tier includes rows: 2,500, Storage: 500, Serverless computing: 1Gb/h, and client app users: 5. 8base 是为 JavaScript 开发者打造、基于 MySQL 与 GraphQL 及无服务器后端即服务的全栈低代码开发平台。让你用 UI 应用构建器快速开始 Web 应用并快速扩展。免费套餐含 2500 行、500 存储、1GB/h 无服务器计算、5 个客户端应用用户。

airtable.com 航空表网 Looks like a spreadsheet, but it's a relational database unlimited bases, 1,200 rows/base, and 1,000 API requests/month 看起来像电子表格，实为关系数据库。无限 base、每 base 1200 行、每月 1000 次 API 请求。

Aiven 艾文 Aiven offers free PostgreSQL, MySQL and Valkey (Redis compatible) plans on its open-source data platform. Single node, 1 CPU, 1GB RAM, and for PostgreSQL and MySQL, 1GB storage. Easy migration to more extensive plans or across clouds. Aiven 在其开源数据平台上提供免费 PostgreSQL、MySQL 与 Valkey（兼容 Redis）套餐。单节点、1 CPU、1GB RAM，PostgreSQL 与 MySQL 各 1GB 存储。可轻松迁移到更大套餐或跨云。

BackupDrill 备份钻取 Backs up Supabase projects to your own S3/R2/B2 bucket, then runs scheduled restore drills to prove backups restore. Provides a free plan with weekly backups for one project and one restore drill on your first backup. 将 Supabase 项目备份到你自己的 S3/R2/B2 桶，然后运行计划恢复演练以证明备份可恢复。免费套餐含一个项目的每周备份与首次备份的一次恢复演练。

CockroachDB Cloud CockroachDB云 Free tier offers 50 million RUs and 10 GiB of storage (same as 15$ worth) free per month. (What's the Request Units) 免费套餐每月提供 5000 万 RU 与 10 GiB 存储（等值 15 美元）免费。（什么是请求单元 RU）

codehooks.io Codehooks.io Easy to use JavaScript serverless API/backend and NoSQL database service with functions, Mongdb-ish queries, key/value lookups, a job system, realtime messages, worker queues, a powerful CLI and a web-based data manager. Free plan has 5GB storage and 60/API calls per minute. 2 developers included. No credit-card required. 易用的 JavaScript 无服务器 API/后端与 NoSQL 数据库服务，含函数、类 Mongdb 查询、键值查找、任务系统、实时消息、工作队列、强大 CLI 与基于 Web 的数据管理器。免费套餐 5GB 存储、每分钟 60 次 API 调用。含 2 名开发者。无需信用卡。

Couchbase Capella 卡佩拉沙发基地 deploy a forever free tier fully managed database cluster with 1 node and 8GB storage, built for developers to create the next generation of applications across IoT to AI 部署永免费、完全托管的数据库集群，1 个节点、8GB 存储，为开发者构建从 IoT 到 AI 的下一代应用而打造。

CrateDB 板条箱数据库 Distributed Open Source SQL database for real-time analytics. Free Tier CRFREE: One-node with 2 CPUs, 2 GiB of memory, 8 GiB of storage. One cluster per organization, no payment method needed. 面向实时分析的开源分布式 SQL 数据库。免费套餐 CRFREE：单节点、2 CPU、2 GiB 内存、8 GiB 存储。每组织 1 个集群，无需支付方式。

filess.io 文件.io filess.io is a platform where you can create two databases with up to 10 MB per database of the following DBMS for free: MySQL, MariaDB, MongoDB, and PostgreSQL. filess.io 是让你免费创建两个数据库（每库最多 10MB）的平台，支持以下 DBMS：MySQL、MariaDB、MongoDB 与 PostgreSQL。

InfluxDB Timeseries database, free up to 3MB/5 minutes writes, 30MB/5 minutes reads and 10,000 cardinalities series 时序数据库，免费写入上限 3MB/5 分钟、读取 30MB/5 分钟、1 万序列基数。

Layerbase 图层库 2 free managed databases, pick from: Postgres, MariaDB, Redis, Valkey, DuckDB, SQLite, libSQL, and TypeDB. All with TLS. Branch 7 of 8 free engines, 1 branch per database - 10 GB/day, 50 GB/week, 150 GB/month throughput limits on free. 10 additional engines available on higher tiers with no meters. 2 个免费托管数据库，可选：Postgres、MariaDB、Redis、Valkey、DuckDB、SQLite、libSQL 与 TypeDB。全部带 TLS。8 个免费引擎中分支 7 个、每库 1 个分支——免费吞吐限制：每天 10GB、每周 50GB、每月 150GB。更高档提供 10 个无计量引擎。

MemCachier 内存缓存器 Managed Memcache service. Free for up to 25MB, 1 Proxy Server, and basic analytics 托管 Memcache 服务。最多 25MB、1 个代理服务器与基础分析免费。

MongoDB Atlas MongoDB 阿特拉斯 free tier gives 512 MB 免费套餐提供 512MB。

Neo4j Aura Neo4j 光环 Managed native Graph DBMS / analytics platform with a Cypher query language and a REST API. Limits on graph size (200k nodes, 400k relationships). 托管原生图 DBMS/分析平台，带 Cypher 查询语言与 REST API。限制图规模（20 万节点、40 万关系）。

Neon 氖 Managed Postgres, 0.5 GB of storage per project, 100 projects, 10 branches per project, 100 CU-hours of compute per project per month, autoscaling up to 2 CU, scales to zero after 5 minutes. Includes S3-compatible Object Storage with 5 GB per project that branches with the database. 5 GB of network transfer per project, shared across all products. 管理型Postgres，每个项目0.5 GB存储空间，100个项目，每个项目10个分支，每月每个项目100 CU小时计算资源，自动扩展至2 CU，5分钟后可缩放至零。包含与S3兼容的对象存储，每个项目5 GB，与数据库分支同步。每个项目5 GB的网络传输量，所有产品共享。

Nile 尼罗河 A Postgres platform for B2B apps. Unlimited databases, Always available with no shutdown, 1GB of storage (total), 50 million query tokens, autoscaling, unlimited vector embeddings 面向 B2B 应用的 Postgres 平台。无限数据库、永不关停、1GB 存储（总计）、5000 万查询 token、自动扩缩、无限向量嵌入。

Prisma Postgres Super fast hosted Postgres built on unikernels and running on bare metal, 500MB total storage, 5 databases, integrated with Prisma ORM. 基于 unikernel 构建、运行于裸金属之上的超快托管 Postgres，总计 500MB 存储、5 个数据库，与 Prisma ORM 集成。

Qdrant 奎德兰特 Vector Database for embedding data, single node cluster with 0.5 vCPU, 1GB RAM, and 4GB disk. 用于嵌入数据的向量数据库，单节点集群含 0.5 vCPU、1GB RAM 与 4GB 磁盘。

restdb.io 休息数据库io a fast and straightforward NoSQL cloud database service. With restdb.io you get schema, relations, automatic REST API (with MongoDB-like queries), and an efficient multi-user admin UI for working with data. The free plan allows 3 users, 2500 records, and 1 API request per second. 快速、直接的 NoSQL 云数据库服务。restdb.io 提供 schema、关系、自动 REST API（类 MongoDB 查询）与高效的多用户数据管理 UI。免费套餐允许 3 名用户、2500 条记录与每秒 1 次 API 请求。

ReviveDB A way back for your Supabase app. ReviveDB keeps recovery points of your database and Auth, Storage files, Edge Functions and supported project configuration, and only calls a backup ready once your database has been restored from it and compared. The free plan covers one project with weekly backups and three recovery points. 为您的Supabase应用程序提供一条退路。ReviveDB保留数据库和Auth、Storage文件、Edge Functions以及支持的项目配置的恢复点，并且仅在您的数据库从它恢复并比较后才会调用备份。免费计划涵盖一个项目，每周备份和三个恢复点。

SeaTable 海底桌 Flexible, Spreadsheet-like Database built by the Seafile team. unlimited tables, 2,000 lines, 1-month versioning, up to 25 team members. 由 Seafile 团队打造的灵活、类电子表格数据库。无限表、2000 行、1 个月版本管理、最多 25 名团队成员。

skyvia.com Skyvia.com Cloud Data Platform offers a free tier and all plans are completely free while in beta 云数据平台提供免费套餐，且在 beta 期间所有套餐完全免费。

StackBy 堆栈依据 One tool that combines spreadsheets' flexibility, databases' power, and built-in integrations with your favorite business apps. The free plan includes unlimited users, ten stacks, and a 2GB attachment per stack. 一款融合电子表格灵活性、数据库能力与你所爱业务应用内置集成的工具。免费套餐含无限用户、10 个 stack 与每 stack 2GB 附件。

Tinybird 小鸟 A serverless managed ClickHouse with connection-less data ingest over HTTP and lets you publish SQL queries as managed HTTP APIs. There is no time limit on free-tier, 10GB storage + 1000 API requests per day. 无服务器托管 ClickHouse，通过 HTTP 无连接数据摄入，并可将 SQL 查询发布为托管 HTTP API。免费套餐无时间限制，10GB 存储 + 每天 1000 次 API 请求。

Turso by ChiselStrike 图尔索（ChiselStrike） Turso is SQLite Developer Experience in an Edge Database. Turso provides a Free Forever starter plan, 9 GB of total storage, Up to 500 databases, Up to 3 locations, 1 billion row reads per month, and Local development support with SQLite. Turso 是边缘数据库中的 SQLite 开发体验。Turso 提供永久免费 starter 套餐，9GB 总存储、最多 500 个数据库、最多 3 个位置、每月 10 亿行读取，以及用 SQLite 的本地开发支持。

Upstash 乌普斯塔什 Serverless Redis with free tier up to 500K monthly commands, 256MB max database size, and 20 concurrent connections 无服务器 Redis，免费套餐每月最多 50 万命令、最大 256MB 数据库大小、20 个并发连接。

Tunneling, WebRTC, Web Socket Servers and Other Routers

cname.dev 域名开发者 Free and secure dynamic reverse proxy service. 免费、安全的动态反向代理服务。

conveyor.cloud 传送带.云 Visual Studio extension to expose IIS Express to the local network or over a tunnel to a public URL. 将 IIS Express 暴露到本地网络或通过隧道到公开 URL 的 Visual Studio 扩展。

Expose 暴露 Expose local sites via secure tunnels. The free plan includes an EU Server, Random subdomains, and Single users. 通过安全隧道暴露本地站点。免费套餐含一个 EU 服务器、随机子域与单一用户。

Hamachi 滨町 LogMeIn Hamachi is a hosted VPN service that lets you securely extend LAN-like networks to distributed teams with a free plan that allows unlimited networks with up to 5 people LogMeIn Hamachi 是托管 VPN 服务，让你以免费套餐安全地将类 LAN 网络扩展到分布式团队，允许无限网络、最多 5 人。

Hookdeck 挂钩甲板 Develop, test, and monitor your webhooks from anywhere. 100K requests and 100K attempts per month with three days retention. 从任意位置开发、测试并监控你的 webhook。每月 10 万请求与 10 万次尝试，保留 3 天。

localhost.run 本地主机.运行 Expose locally running servers over a tunnel to a public URL. 通过隧道将本地运行的服务器暴露到公开 URL。

localtonet 本地网络 Multi-protocol tunneling for HTTP, TLS, TCP, UDP, File Server (Default, SFTP, WebDAV), and Proxy Tunnel (HTTP, SOCKS5, Shadowsocks, VLESS). Free plan: 1 tunnel, 1GB/month bandwidth, 30 min timeout (excl. HTTP Tunnels). 面向 HTTP、TLS、TCP、UDP、文件服务器（默认、SFTP、WebDAV）与代理隧道（HTTP、SOCKS5、Shadowsocks、VLESS）的多协议隧道。免费套餐：1 个隧道、每月 1GB 带宽、30 分钟超时（HTTP 隧道除外）。

localtunnel 本地隧道 Expose locally running servers over a tunnel to a public URL. Free hosted version, and open source. 通过隧道将本地运行的服务器暴露到公开 URL。免费托管版本，且开源。

LocalXpose 本地Xpose Reverse proxy that enables you to expose your localhost servers to the internet. The free plan has 15 minutes tunnel lifetime. 让你将 localhost 服务器暴露到互联网的反向代理。免费套餐隧道寿命 15 分钟。

ngrok.com Expose locally running servers over a tunnel to a public URL. 通过隧道将本地运行的服务器暴露到公开 URL。

Pinggy 平吉 Public URLs for localhost with a single command, no downloads required. HTTPS / TCP / TLS tunnels. The free plan has 60 minutes tunnel lifetime. 单条命令即获得 localhost 的公开 URL，无需下载。HTTPS / TCP / TLS 隧道。免费套餐隧道寿命 60 分钟。

Radmin VPN 远程VPN Connect multiple computers together via a VPN-enabling LAN-like network. Unlimited peers. (Hamachi alternative) 通过启用 VPN 的局域网式网络将多台电脑相连。无限对等节点。（Hamachi 替代品）

serveo 服务 Expose local servers to the internet. No installation, no signup. Free subdomain, no limits. 将本地服务器暴露到互联网。无需安装、无需注册。免费子域，无限制。

stun:global.stun.twilio.com:3478?transport=udp Twilio STUN

stun:stun.l.google.com:19302 晕:stun.l.google.com:19302 Google STUN

Tailscale 尾鳞 Zero config VPN, using the open-source WireGuard protocol. Installs on MacOS, iOS, Windows, Linux, and Android devices. Free plan for personal use with 100 devices and three users. 零配置 VPN，使用开源 WireGuard 协议。可安装于 MacOS、iOS、Windows、Linux 与 Android 设备。个人使用免费套餐含 100 台设备与 3 名用户。

webhookrelay.com Manage, debug, fan-out, and proxy all your webhooks to public or internal (i.e. localhost) destinations. Also, expose servers running in a private network over a tunnel by getting a public HTTP endpoint (`https://yoursubdomain.webrelay.io <----> http://localhost:8080`). 管理、调试、扇出（fan-out）并将你的全部 webhook 代理到公开或内部（即 localhost）目标。也可通过获取公开 HTTP 端点（`https://yoursubdomain.webrelay.io <----> http://localhost:8080`）经隧道暴露运行在私有网络中的服务器。

Xirsys 西尔西斯 Unlimited STUN usage + 500 MB monthly TURN bandwidth, capped bandwidth, single geographic region. 无限 STUN 使用 + 每月 500MB TURN 带宽，带宽受限，单一地理区域。

ZeroTier 零层 FOSS managed virtual Ethernet as a service. Unlimited end-to-end encrypted networks of 25 clients on the free plan. Clients for desktop/mobile/NA; web interface for configuration of custom routing rules and approval of new client nodes on private networks FOSS 托管的虚拟以太网即服务。免费套餐含 25 个客户端的无限端到端加密网络。桌面/移动/NA 客户端；用于配置自定义路由规则与审批私有网络中新客户端节点的 Web 界面。

Issue Tracking and Project Management

acunote.com Free project management and SCRUM software for up to 5 team members 最多 5 名团队成员的免费项目管理与 SCRUM 软件。

asana.com 体式网站 Free for private project with collaborators 协作者私有项目免费。

Backlog 积压 Everything your team needs to release great projects in one platform. The free plan offers 1 Project with ten users & 100MB of storage. 你的团队在一个平台发布优秀项目所需的一切。免费套餐含 1 个项目、10 名用户与 100MB 存储。

Basecamp 大本营 To-do lists, milestone management, forum-like messaging, file sharing, and time tracking. Up to 3 projects, 20 users, and 1GB of storage space. 待办列表、里程碑管理、论坛式消息、文件共享与工时追踪。最多 3 个项目、20 名用户与 1GB 存储空间。

bitrix24.com 比特里克斯24.com Intranet and project management tool. The free plan has 5GB for unlimited users. 内联网与项目管理工具。免费套餐为无限用户提供 5GB。

cacoo.com 可可网 Online real-time diagrams: flowchart, UML, network. Free max. 15 users/diagram, 25 sheets 在线实时图表：流程图、UML、网络。免费最多 15 名用户/图、25 张工作表。

clickup.com Project management. Free, premium version with cloud storage. Mobile applications and Git integrations are available. 项目管理。免费，高级版含云存储。提供移动应用与 Git 集成。

Clockify 时钟化 Time tracker and timesheet app that lets you track work hours across projects. Unlimited users, free forever. 让你跨项目追踪工作时间的工时追踪与考勤表应用。无限用户，永久免费。

Cloudcraft 云艺 Design a professional architecture diagram in minutes with the Cloudcraft visual designer, optimized for AWS with intelligent components that show live data too. Free plan has unlimited private diagrams for single user. 用 Cloudcraft 可视化设计器在数分钟设计专业架构图，针对 AWS 优化，智能组件还能显示实时数据。免费套餐为单一用户提供无限私有图表。

Confluence 合流 Atlassian's content collaboration tool is used to help teams collaborate and share knowledge efficiently. Free plan for up to 10 users. Atlassian 的内容协作工具，用于帮助团队高效协作与共享知识。最多 10 名用户的免费套餐。

Crosswork 交叉作业 Versatile project management platform. Free for up to 3 projects, unlimited users, 1 GB storage. 多功能项目管理平台。最多 3 个项目、无限用户、1GB 存储免费。

diagrams.net 图解网 Online diagrams stored locally in Google Drive, OneDrive, or Dropbox. Free for all features and storage levels 在线图表，本地存储于 Google Drive、OneDrive 或 Dropbox。全部特性与存储级别免费。

easyretro.io Easyretro.io Simple and intuitive sprint retrospective tool. The free plan has three public boards and one survey per board per month. 简单直观的 sprint 回顾（retrospective）工具。免费套餐含每月 3 个公开看板与每看板 1 次调查。

freedcamp.com tasks, discussions, milestones, time tracking, calendar, files and password manager. Free plan with unlimited projects, users, and file storage. 任务、讨论、里程碑、工时追踪、日历、文件与密码管理器。免费套餐含无限项目、用户与文件存储。

GForge 格锻造 Project Management and issue Tracking toolset for complex projects with self-premises and SaaS options. SaaS free plan offers the first five users free & free for Open Source Projects. 面向复杂项目、含本地与 SaaS 选项的项目管理与问题追踪工具集。SaaS 免费套餐前 5 名用户免费，开源项目免费。

gleek.io 格莱克io Free description-to-diagrams tool for developers. Create informal UML class, object, or entity-relationship diagrams using your keyword. 面向开发者的免费"描述转图表"工具。用关键词创建非正式的 UML 类、对象或实体关系图。

GraphQL Inspector GraphQL 检查器 GraphQL Inspector outputs a list of changes between two GraphQL schemas. Every difference is precisely explained and marked as breaking, non-breaking, or dangerous. GraphQL Inspector 输出两个 GraphQL schema 之间的变更列表。每项差异都被精确解释并标记为破坏性、非破坏性或危险。

Helploom 帮助布卢姆 Customer support software that offers a live chat on the free forever plan. Simple, lightweight and beautiful. Setup is a simple copy-paste script. Built by a developer. 在永久免费套餐上提供实时聊天的客户支持软件。简单、轻量且美观。设置只需复制粘贴一段脚本。由开发者打造。

HeyRetro 嘿复古 Real-time sprint retrospective platform with voting, timers, surveys, guest collaboration, and ice-breaker games. The forever-free plan includes one board per month, anonymous surveys, and guest link sharing. 带投票、计时器、调查、访客协作与破冰游戏的实时 sprint 回顾平台。永久免费套餐含每月 1 个看板、匿名调查与访客链接分享。

Hygger 海格尔 Project management platform. The free plan offers unlimited users, projects & boards with 100 MB of Storage. 项目管理平台。免费套餐含无限用户、项目与看板，100MB 存储。

Ilograph 伊洛格 interactive diagrams that allow users to see their infrastructure from multiple perspectives and levels of detail. Charts can be expressed in code. The free tier has unlimited private diagrams with up to 3 viewers. 允许用户从多视角与多细节层级查看其基础设施的交互式图表。图表可用代码表达。免费套餐含无限私有图表，最多 3 名查看者。

Jira 吉拉 Advanced software development project management tool used in many corporate environments. Free plan for up to 10 users. 用于众多企业环境的进阶软件开发项目管理工具。最多 10 名用户的免费套餐。

kan.bn A powerful, flexible kanban app that helps you organise work, track progress, and deliver results-all in one place. Free plan up to 1 user for unlimited boards, unlimited lists, unlimited cards. 强大、灵活的看板应用，帮助你组织工作、追踪进度并交付成果——皆在一处。免费套餐最多 1 名用户，含无限看板、无限列表、无限卡片。

kanbanflow.com Board-based project management. Free, premium version with more options 基于看板的项目管理。免费，高级版选项更多。

kanbantool.com Kanban board-based project management. The free plan has two boards and two users, without attachments or files. 基于看板的项目管理。免费套餐含 2 个看板、2 名用户，不含附件或文件。

Kitemaker.co 风筝制造商 Collaborate through all phases of the product development process and keep track of work across Slack, Discord, Figma, and Github. Unlimited users, unlimited spaces. Free plan up to 250 work items. 贯穿产品开发全流程协作，并跨 Slack、Discord、Figma 与 Github 追踪工作。无限用户、无限空间。免费套餐最多 250 个工作项。

Kiter.app 奇特应用程序 Let anyone organize their job search and track interviews, opportunities, and connections. Powerful web app and Chrome extension. Completely free. 让任何人组织求职并追踪面试、机会与人脉。强大的 Web 应用与 Chrome 扩展。完全免费。

Kumu.io 库姆io Relationship maps with animation, decorations, filters, clustering, spreadsheet imports, etc. The free tier allows unlimited public projects. Graph size unlimited. Free private projects for students. Sandbox mode is available if you prefer not to leave your file publicly online (upload, edit, download, discard). 带动画、装饰、过滤、聚类、电子表格导入等的关系图。免费套餐允许无限公开项目。图大小无限。学生免费私有项目。若不希望文件公开在线，可用沙箱模式（上传、编辑、下载、丢弃）。

leiga.com Leiga is a SaaS product that uses AI to automatically manage your projects, helping your team stay focused and unleash immense potential, ensuring your projects progress as planned. Free for up to 10 users, 20 custom fields, 2GB of storage space, Video Recording with AI limited to 5 mins/video, Automation Runs at 20/user/month. Leiga 是采用 AI 自动管理项目的 SaaS 产品，帮助团队保持专注、释放巨大潜力，确保项目按计划推进。最多 10 名用户、20 个自定义字段、2GB 存储空间、AI 视频录制限每视频 5 分钟、自动化运行 20/用户/月免费。

Linear 线性 Issue tracker with a streamlined interface. Free for unlimited members, up to 10MB file upload size, 250 issues (excluding Archive) 界面精简的问题追踪器。无限成员、最大 10MB 文件上传、250 个问题（不含归档）免费。

Lucidchart 清晰图 An online diagram tool with collaboration features. Free plan with three editable documents, 100 professional templates, and basic collaboration features. 带协作特性的在线图表工具。免费套餐含 3 个可编辑文档、100 个专业模板与基础协作特性。

MeisterTask 大师任务 Online task management for teams. Free up to 3 projects and unlimited project members. 面向团队的在线任务管理。最多 3 个项目与无限项目成员免费。

MeuScrum 菜单Scrum Free online scrum tool with kanban board 带看板的免费在线 scrum 工具。

myspec.dev Spec-Driven Development (SDD) architect tool that interviews developers and generates structured 4-file spec bundles with MCP server integration. Free tier covers 20 projects and 100 spec files. 以规范驱动开发（SDD）架构工具，对开发者进行访谈并生成带有MCP服务器集成的结构化4文件规范包。免费层覆盖20个项目和100个规范文件。

nTask 任务 Project management software that enables your teams to collaborate, plan, analyze, and manage everyday tasks. The essential plan is free forever with 100 MB storage and five users/teams. Unlimited workspaces, meetings, assignments, timesheets, and issue tracking. 让你的团队协作、规划、分析与管理的项目管理软件。基础套餐永久免费，100MB 存储、5 名用户/团队。无限工作区、会议、分配、考勤表与问题追踪。

Plane 飞机 Plane is a simple, extensible, open-source project and product management tool. Free for unlimited members, up to 5MB file upload size, 1000 issues. 简单、可扩展的开源项目与产品管理工具。无限成员、最大 5MB 文件上传、1000 个问题免费。

planitpoker.com Free online planning poker (estimation tool) 免费在线规划扑克（估算工具）。

point.poker 点扑克 Online Planning Poker (consensus-based estimation tool). Free for unlimited users, teams, sessions, rounds, and votes. You don't need to register. 在线规划扑克（基于共识的估算工具）。无限用户、团队、会话、轮次与投票免费。无需注册。

Pulse.red 脉冲红 Free Minimalistic Time Tracker and Timesheet app for projects. 面向项目的免费极简工时追踪与考勤表应用。

ScrumFast Scrum board with a very intuitive interface, free up to 5 users. 界面非常直观的 scrum 看板，最多 5 名用户免费。

Sflow 流动 sflow.io is a project management tool built for agile software development, marketing, sales, and customer support, especially for outsourcing and cross-organization collaboration projects. Free plan up to 3 projects and five members. sflow.io 是面向敏捷软件开发、营销、销售与客户支持构建的项目管理工具，尤其适合外包与跨组织协作项目。最多 3 个项目、5 名成员免费。

Shake 摇 In-app bug reporting and feedback tool for mobile apps. Free plan, ten bug reports per app/month. 面向移动应用的应用内缺陷报告与反馈工具。免费套餐每应用每月 10 份缺陷报告。

Shortcut 捷径 Project management platform. Free for up to 10 users forever. 项目管理平台。最多 10 名用户永久免费。

taiga.io 针叶林io Project management platform for startups and agile developers, free for Open Source 面向初创与敏捷开发者的项目管理平台，开源免费。

taskade.com 任务网 Real-time collaborative task lists and team outlines. The free plan has one workspace with unlimited tasks and projects; 1GB file storage; 1-week project history; and five attendees per video meeting. 实时协作任务列表与团队大纲。免费套餐含 1 个工作区、无限任务与项目、1GB 文件存储、1 周项目历史与每次视频会议 5 名参与者。

Teaminal 团队 Standup, retro, and sprint planning tool for remote teams. Free for up to 15 users. 面向远程团队的站会、回顾与 sprint 规划工具。最多 15 名用户免费。

teamwork.com Project management & Team Chat. Free for five users and two projects. Premium plans are available. 项目管理与团队聊天。5 名用户与 2 个项目免费。提供高级套餐。

teleretro.com Simple and fun retrospective tool with icebreakers, gifs and emojis. The free plan includes three retros and unlimited members. 带破冰、gif 与 emoji 的简单有趣回顾工具。免费套餐含 3 次回顾与无限成员。

Tenzu 天足 Lightweight project management tool for agile teams. The SaaS relies on free contributions; users can always choose to give 0 and there is no features paywall {more details} 面向敏捷团队的轻量项目管理工具。该 SaaS 依赖免费捐助；用户可随时选择付 0，且无特性付费墙 {更多详情}。

titanapps.io productivity tools for Jira and monday.com offering structured checklists, templates, and approvals inside issues/tasks. Free plan available for small teams. 面向 Jira 与 monday.com 的生产力工具，在问题/任务内提供结构化清单、模板与审批。小团队有免费套餐。

todoist.com Collaborative and individual task management. The free plan has: 5 active projects, five users in the project, file uploading up to 5MB, three filters, and one week of activity history. 协作与个人的任务管理。免费套餐：5 个活跃项目、项目中 5 名用户、最大 5MB 文件上传、3 个过滤器与 1 周活动历史。

Toggl 托格尔 Provides two free productivity tools. Toggl Track for time management and tracking app with a free plan provides seamless time tracking and reporting designed with freelancers in mind. It has unlimited tracking records, projects, clients, tags, reporting, and more. And Toggl Plan for task planning with a free plan for solo developers with unlimited tasks, milestones, and timelines. 提供两个免费生产力工具。Toggl Track 为时间管理与追踪应用，免费套餐提供为自由职业者设计的无缝时间追踪与报告，含无限追踪记录、项目、客户、标签、报告等。Toggl Plan 为任务规划，面向独立开发者的免费套餐含无限任务、里程碑与时间线。

trello.com Board-based project management. Unlimited Personal Boards, 10 Team Boards. 基于看板的项目管理。无限个人看板、10 个团队看板。

Tweek 特维克 Simple Weekly To-Do Calendar & Task Management. 简单的周度待办日历与任务管理。

Wikifactory 维基工厂 Product designing Service with Projects, VCS & Issues. The free plan offers unlimited projects & collaborators and 3GB storage. 含项目、VCS 与问题的产品设计服务。免费套餐含无限项目与协作者、3GB 存储。

Yodiz 尤迪兹 Agile development and issue tracking. Free up to 3 users, unlimited projects. 敏捷开发与问题追踪。最多 3 名用户、无限项目免费。

YouTrack 尤追踪 Free hosted YouTrack (InCloud) for FOSS projects and private projects (free for three users). Includes time tracking and agile boards 面向 FOSS 项目与私有项目（3 名用户免费）的托管 YouTrack（InCloud）。含工时追踪与敏捷看板。

zenhub.com The only project management solution inside GitHub. Free for public repos, OSS, and nonprofit organizations 唯一内置于 GitHub 的项目管理方案。公开仓库、OSS 与非营利组织免费。

zenkit.com Project management and collaboration tool. Free for up to 5 members, 5 GB attachments. 项目管理与协作工具。最多 5 名成员、5GB 附件免费。

Zube 祖贝 Project management with free plan for 4 Projects & 4 users. GitHub integration is available. 含 4 个项目与 4 名用户免费套餐的项目管理。可用 GitHub 集成。

Storage and Media Processing

AndroidFileHost Android文件主机 Free file-sharing platform with unlimited speed, bandwidth, file count, download count, etc. It is mainly aimed for Android dev-related files like APK build, custom ROM & modifications, etc. But seems to accept any other files as well. 无限速度、带宽、文件数、下载数等的免费文件共享平台。主要面向 APK 构建、自定义 ROM 与修改等 Android 开发相关文件，但也接受任何其他文件。

anon.li Drop anon.li 掉落 Zero-knowledge E2EE file sharing with client-side AES-256-GCM encryption and zero server-side data access. Free uploads for files up to 5GB with max expiry up to 3 days through the website, CLI or API. 零知识 E2EE 文件共享，含客户端 AES-256-GCM 加密与零服务端数据访问。通过网站、CLI 或 API 免费上传最大 5GB、最长 3 天过期的文件。

borgbase.com Simple and secure offsite backup hosting for Borg Backup. 10 GB free backup space and two repositories. 面向 Borg Backup 的简洁安全离岸备份托管。10GB 免费备份空间与 2 个仓库。

cloudinary.com 云数网 Image upload, powerful manipulations, storage, and delivery for sites and apps, with Ruby, Python, Java, PHP, Objective-C, and more libraries. The free tier includes 25 monthly credits. One credit equals 1,000 image transformations, 1 GB of storage, or 1 GB of CDN usage. 面向站点与应用的图片上传、强大处理、存储与分发，含 Ruby、Python、Java、PHP、Objective-C 等库。免费套餐含每月 25 额度。1 额度 = 1000 次图片变换、1GB 存储或 1GB CDN 使用。

degoo.com 德谷网 AI based cloud storage with free up to 20 GB, three devices, 5 GB referral bonus (90 days account inactivity). 基于 AI 的云存储，免费最多 20GB、3 台设备、5GB 推荐奖励（90 天账户不活跃）。

dlvr.sh Temporary file delivery for agents and automation. Free tier includes 10 deliveries every 24 hours with API, MCP, and CLI access. 面向智能体与自动化的临时文件投递。免费套餐每 24 小时 10 次投递，含 API、MCP 与 CLI 访问。

Dropshare 滴共享 Zero-knowledge file sharing. End-to-end encrypted file sharing with AES-256-GCM encryption, client-side processing, and zero server-side data access. Free uploads for files up to 1GB with no data collection. 零知识文件共享。端到端加密文件共享，含 AES-256-GCM 加密、客户端处理与零服务端数据访问。最大 1GB 文件免费上传，无数据收集。

embed.ly 嵌入.ly Provides APIs for embedding media in a webpage, responsive image scaling, and extracting elements from a webpage. Free for up to 5,000 URLs/month at 15 requests/second 提供在网页中嵌入媒体、响应式图片缩放与从网页提取元素的 API。免费最多每月 5000 URL、15 请求/秒。

Ente 恩特 Ente is an end-to-end encrypted cloud for photos, videos and 2FA secrets. Can also be self-hosted along with a generous forever free-tier of 10GB. For free tier users, only single replica of data is kept. Ente 是面向照片、视频与 2FA 密钥的端到端加密云。也可自托管，并含 10GB 的慷慨永久免费套餐。免费套餐用户仅保留数据单一副本。

FileShot.io Zero-knowledge encrypted file sharing. AES-256-GCM browser-side encryption ensures files are encrypted in-browser before upload. No account required for sender or recipient. Self-hostable (MIT open-source). Free tier includes unlimited uploads with no file size restrictions. 零知识加密文件共享。AES-256-GCM 浏览器端加密确保文件在上传前于浏览器内加密。发送者与接收者均无需账号。可自托管（MIT 开源）。免费套餐含无限上传、无文件大小限制。

file.io 文件.io 2 GB storage of files. A file is auto-deleted after one download. REST API to interact with the storage. Rate limit one request/minute. 2GB 文件存储。文件在首次下载后自动删除。与存储交互的 REST API。速率限制每分钟 1 次请求。

freetools.site 免费工具网站 Free online tools. Convert or edit documents, images, audio, video, and more. 免费在线工具。转换或编辑文档、图像、音频、视频等。

getpantry.cloud A simple JSON data storage API perfect for personal projects, hackathons, and mobile apps! 适合个人项目、黑客松与移动应用的简单 JSON 数据存储 API！

GoFile.io Free file sharing and storage platform can be used via web-based UI & also API. unlimited file size, bandwidth, download count, etc. But it will be deleted when a file becomes inactive (no download for more than ten days). 可通过 Web UI 与 API 使用的免费文件共享与存储平台。无限文件大小、带宽、下载数等。但文件在变为不活跃（超过 10 天无下载）时将被删除。

gumlet.com 古姆雷特网站 Image and video hosting, processing and streaming via CDN. Provides generous free tier of 250 GB / month for videos and 30 GB / month for images. 经 CDN 的图片与视频托管、处理与流媒体。提供慷慨的免费套餐：视频 250GB/月、图片 30GB/月。

hyperserve.io Video backend API for developers: accept any format your users upload, transcode to MP4, and deliver globally via CDN. The free tier includes 50 videos, 1 GB per file, and 250 GB bandwidth per month. 为开发者提供的视频后端API：接受用户上传的任何格式，转码为MP4，并通过CDN全球分发。免费层包括50个视频，每个文件1GB，每月250GB带宽。

icedrive.net 冰驱动网 Simple cloud storage service. 10 GB free storage 简洁云存储服务。10GB 免费存储。

image-charts.com Unlimited image chart generation with a watermark 带水印的无限图片图表生成。

ImageEngine 图像引擎 ImageEngine is an easy to use global image CDN. Sub 60 sec setup. AVIF and JPEGXL support, WordPress-, Magento-, React-, Vue- plugins and more. Claim your free developer account here. ImageEngine 是易用的全球图片 CDN。60 秒内完成设置。支持 AVIF 与 JPEGXL，含 WordPress、Magento、React、Vue 等插件。在此认领你的免费开发者账号。

imagekit.io Image CDN with automatic optimization, real-time transformation, and storage that you can integrate with existing setup in minutes. The free plan includes up to 20GB of bandwidth per month. 自动优化、实时变换与存储的图片 CDN，数分钟即可集成现有设置。免费套餐每月最多 20GB 带宽。

ImgBB 免疫组化 ImgBB is an unlimited image hosting service. Drag and drop your image anywhere on the screen. 32 MB / image limit. Receive Direct image links, BBCode and HTML thumbnails after uploading image. Login to see the upload history. ImgBB 是无限图片托管服务。将图片拖放到屏幕任意位置。每图 32MB 限制。上传后获得直链、BBCode 与 HTML 缩略图。登录查看上传历史。

Imgbot 图像机器人 Imgbot is a friendly robot that optimizes your images and saves you time. Optimized images mean smaller file sizes without sacrificing quality. It's free for open source. Imgbot 是优化你的图片、为你省时的友好机器人。优化的图片意味着在不牺牲质量的前提下更小的文件。开源免费。

imgen 伊姆根 On the fly image generation API (text over background, logo) for opengraph images, free, no watermark, CDN 用于 opengraph 图片的即时图片生成 API（背景上的文字、logo），免费、无水印、CDN。

imgix 伊姆吉克斯 Image Caching, management and CDN. Free plan includes 1000 origin images, infinite transformations and 100 GB bandwidth 图片缓存、管理与 CDN。免费套餐含 1000 张源图、无限变换与 100GB 带宽。

internxt.com 实习生网 Internxt Drive is a zero-knowledge file storage service based on absolute privacy and uncompromising security. Sign up and get 10 GB for free, forever! Internxt Drive 是基于绝对隐私与无妥协安全性的零知识文件存储服务。注册即获永久 10GB 免费！

kraken.io 海怪IO Image optimization for website performance as a service, free plan up to 1 MB file size 以服务形式提供的网站性能图片优化，免费套餐最大 1MB 文件。

LibreQR 自由QR Free QR code generator focused on privacy and no tracking. Free to use with no data collection. 注重隐私、无追踪的免费二维码生成器。免费使用，无数据收集。

MConverter 麦克转换器 Convert files in bulk. Supports many formats, including AVIF and JXL. Extract image frames from videos. Compress PDFs. Free for 15 files per 24h, up to 100 MB each, processed in batches of eight. 批量转换文件。支持多种格式，含 AVIF 与 JXL。从视频提取图像帧。压缩 PDF。每 24 小时 15 个文件免费，每个最大 100MB，按 8 个一批处理。

nitropack.io 硝基包装.io Accelerate your site's speed on autopilot with complete front-end optimization (caching, images and code optimization, CDN). Free for up to 5,000 pageviews/month 用完整的端到端优化（缓存、图片与代码优化、CDN）自动加速你的站点。最多每月 5000 页面浏览免费。

npoint.io JSON store with collaborative schema editing 带协作 schema 编辑的 JSON 存储。

MantleDB 曼特尔数据库 Anonymous JSON storage for scripts and tiny apps. No signup required; uses Master AID for updates and Read-Only RID for public fetching. Free tier includes 1 bucket (1MB limit) with a 72h inactivity scavenger policy. 面向脚本与微型应用的匿名 JSON 存储。无需注册；更新用 Master AID，公开拉取用只读 RID。免费套餐含 1 个桶（1MB 限制），采用 72 小时不活跃清理策略。

otixo.com Encrypt, share, copy, and move all your cloud storage files from one place. The basic plan provides unlimited file transfer with 250 MB max. file size and allows five encrypted files 从一处加密、共享、复制并移动你的全部云存储文件。基础套餐提供无限文件传输、最大 250MB 文件，并允许 5 个加密文件。

packagecloud.io Hosted Package Repositories for YUM, APT, RubyGem and PyPI. Limited free plans and open-source plans are available via request 面向 YUM、APT、RubyGem 与 PyPI 的托管包仓库。有限免费套餐与开源套餐可经申请获得。

pcloud.com 云云网 Cloud storage service. Up to 10 GB of free storage 云存储服务。最多 10GB 免费存储。

Pinata IPFS 皮纳塔IPFS Pinata is the simplest way to upload and manage files on IPFS. Our friendly user interface and IPFS API make Pinata the easiest IPFS pinning service for platforms, creators, and collectors. 1 GB storage free, along with access to API. Pinata 是在 IPFS 上传与管理文件的最简单方式。友好的用户界面与 IPFS API 让 Pinata 成为平台、创作者与收藏者最易用的 IPFS pinning（固定）服务。1GB 免费存储，并可使用 API。

plot.ly 情节.ly Graph and share your data. The free tier includes unlimited public files and ten private files 图表并分享你的数据。免费套餐含无限公开文件与 10 个私有文件。

podio.com 跑道网 You can use Podio with a team of up to five people and try out the features of the Basic Plan, except user management 你可与最多 5 人的团队使用 Podio，并试用基础套餐的特性（用户管理除外）。

Proton Drive 质子驱动器 Ultra-secure cloud storage for files and key documents. Free plan offers 5gb of storage space. 面向文件与关键文档的超安全云存储。免费套餐提供 5GB 存储空间。

QRtracer 二维码追踪器 Free QR code generator with built-in scan analytics, bulk generation & brand customisation, focused on reliability without any ads. 带内置扫码分析、批量生成与品牌定制的免费二维码生成器，专注可靠、无广告。

QuickChart 快速图表 Generate embeddable image charts, graphs, and QR codes 生成可嵌入的图片图表、曲线图与二维码。

redbooth.com 红布斯网站 P2P file syncing, free for up to 2 users P2P 文件同步，最多 2 名用户免费。

resmush.it reSmush.it is a FREE API that provides image optimization. reSmush.it has been implemented on the most common CMS such as WordPress, Drupal, or Magento. reSmush.it is the most used image optimization API with more than seven billion images already treated, and it is still Free of charge. reSmush.it 是提供图片优化的免费 API。已实现于 WordPress、Drupal 或 Magento 等最常见的 CMS。reSmush.it 是使用量最大的图片优化 API，已处理超 70 亿张图片，且仍完全免费。

sirv.com Sirv.com Smart Image CDN with on-the-fly image optimization and resizing. The free tier includes 500 MB of storage and 2 GB of bandwidth. 带即时图片优化与缩放的智能图片 CDN。免费套餐含 500MB 存储与 2GB 带宽。

SlingSite 吊索网站 Create all the optimized versions of your images and videos. For Free. In bulk. For each image, you get the following formats: AVIF, WEBP and JPG in the three selected resolutions (desktop, tablet, mobile) For videos, you get: WebM (codec VP9), MP4 (codec HEVC aka H.265) and MP4 (codec AVC aka H.264) plus the cover image with the first frame. 免费、批量创建你图片与视频的所有优化版本。每图获得以下格式：AVIF、WEBP 与 JPG，在三种选定分辨率（桌面、平板、移动）。视频获得：WebM（VP9 编码）、MP4（HEVC 即 H.265）与 MP4（AVC 即 H.264），外加首帧封面图。

sync.com 同步网 End-to-End cloud storage service. 5 GB of free storage 端到端云存储服务。5GB 免费存储。

tinypng.com API to compress and resize PNG and JPEG images, offers 500 compressions for free each month 压缩与缩放 PNG 与 JPEG 图片的 API，每月免费提供 500 次压缩。

transloadit.com 转运网 Handles file uploads and encoding of video, audio, images, documents. Free for Open source, charities, and students via the GitHub Student Developer Pack. Commercial applications get 2 GB free for test driving 处理文件上传与视频、音频、图片、文档的编码。开源、慈善机构与学生经 GitHub Student Developer Pack 免费。商业应用可获 2GB 免费试用。

twicpics.com Responsive images as a service. It provides an image CDN, a media processing API, and a frontend library to automate image optimization. The service is free for up to 3GB of traffic/per month. 响应式图片即服务。提供图片 CDN、媒体处理 API 与前端库以自动化图片优化。每月最多 3GB 流量免费。

uploadcare.com 上传护理网 Uploadcare provides the media pipeline with the ultimate toolkit based on cutting-edge algorithms. All features are available for developers absolutely for free: File Uploading API and UI, Image CDN and Origin Services, Adaptive Delivery, and Smart Compression. The free tier has 3000 uploads, 3 GB traffic, and 3 GB storage. Uploadcare 以尖端算法提供带终极工具包的媒体管线。所有特性对开发者完全免费：文件上传 API 与 UI、图片 CDN 与源服务、自适应分发与智能压缩。免费套餐含 3000 次上传、3GB 流量与 3GB 存储。

VaocherApp QR Code Generator VaocherApp 二维码生成器 Easily create custom QR codes for gift cards, gift vouchers, and promotions. Support custom styling, color, logo... 轻松为礼品卡、礼券与促销创建自定义二维码。支持自定义样式、颜色、logo……

Design and UI

Beste 贝斯特 A composition-first website builder based on shadcn/ui blocks. The free plan lets you connect your own custom domain, and includes unlimited pages, multi-language support, blog, forms, and hosting. 基于 shadcn/ui 区块、组合优先的网站构建器。免费套餐让你连接自己的自定义域名，含无限页面、多语言支持、博客、表单与托管。

BoxySVG A free installable Web app for drawing SVGs and exporting in SVG, PNG, jpeg, and other formats. 用于绘制 SVG 并导出为 SVG、PNG、jpeg 与其他格式的免费可安装 Web 应用。

BrandIcons 品牌图标 Favicon API. AI-based discovery for domains without icons or even without web servers. Free tier includes 500,000 requests per month with attribution. Favicon API。基于 AI 的发现，面向无图标甚至无 Web 服务器的域名。免费套餐含每月 50 万次请求（需署名）。

Calendar Icons Generator 日历图标生成器 Generate an entire year's worth of unique icons in a single click, absolutely FREE 单击即生成一整年的独特图标，完全免费。

Canva 帆布 Free online design tool to create visual content. 创建视觉内容的免费在线设计工具。

CodedThemes 编码主题 Offers a well-crafted admin dashboard & and UI kits designed to simplify and speed up modern web development. 提供精心打造的管理仪表盘与 UI 套件，旨在简化并加速现代 Web 开发。

Excalidraw A free online drawing document web page with free save to local and export support. 免费在线绘图文档网页，支持免费保存到本地与导出。

figma.com Figma.com Online, collaborative design tool for teams; free tier includes unlimited files and viewers with a max of 2 editors and three projects. 面向团队的在线协作设计工具；免费套餐含无限文件与查看者，最多 2 名编辑者与 3 个项目。

Flows 流量 A fully customizable product adoption platform for building onboarding and user engagement experiences. Free for up to 250 monthly tracked users. 用于构建入门引导与用户参与体验、完全可定制的产品采用（adoption）平台。最多每月 250 名追踪用户免费。

JoyDemo Create interactive and clickable demos of your website or app. Free with unlimited demos and unlimited views. 创建您网站或应用的交互式和可点击的演示。免费，包含无限次演示和无限次查看。

landen.co 兰登公司 Generate, edit, and publish beautiful websites and landing pages for your startup. All without code. The free tier allows you to have one website, fully customizable and published on the web. 为你的初创生成、编辑并发布精美网站与落地页。全程无代码。免费套餐允许你拥有一个完全可定制并发布到 Web 的网站。

lensdump.com 镜头转储网站 Free cloud image hosting. 免费云图片托管。

Logo.dev 标志.dev Company logo API with 44M+ brands that's as easy as calling a URL. First 10,000 API calls are free. 含 4400 万+ 品牌的公司 logo API，调用一个 URL 般简单。前 1 万次 API 调用免费。

marvelapp.com Design, prototyping, and collaboration, free plan limited to one user and project. 设计、原型与协作，免费套餐限 1 名用户与 1 个项目。

Mindmup.com Unlimited mind maps for free and store them in the cloud. Your mind maps are available everywhere, instantly, from any device. 无限思维导图免费，并存储于云端。你的思维导图随处可用、即时、跨任意设备。

Mockplus iDoc 摹客iDoc Mockplus iDoc is a powerful design collaboration & handoff tool. Free Plan includes three users and five projects with all features available. Mockplus iDoc 是强大的设计协作与交付工具。免费套餐含 3 名用户与 5 个项目，全部特性可用。

photopea.com 影像豌豆网 A Free, Advanced online design editor with Adobe Photoshop UI supporting PSD, XCF & Sketch formats (Adobe Photoshop, Gimp and Sketch App). 免费、高级的在线设计编辑器，具备 Adobe Photoshop UI，支持 PSD、XCF 与 Sketch 格式（Adobe Photoshop、Gimp 与 Sketch App）。

Plasmic 等离子 A fast, easy-to-use, robust web design tool and page builder that integrates into your codebase. Build responsive pages or complex components; optionally extend with code; and publish to production sites and apps. 快速、易用、稳健的 Web 设计工具与页面构建器，可集成到你的代码库。构建响应式页面或复杂组件；可选代码扩展；并发布到生产站点与应用。

Proto.io 原型.io Create fully interactive UI prototypes without coding. The free tier is available when the free trial ends. The free tier includes one user, one project, five prototypes, 100MB of online storage, and a preview of the proto.io app. 无需编码即可创建完全交互的 UI 原型。免费套餐在免费试用结束后可用。免费套餐含 1 名用户、1 个项目、5 个原型、100MB 在线存储与 proto.io 应用预览。

Quant Ux 定量用户体验 Quant Ux is a prototyping and design tool. - It's completely free and also open source. Quant Ux 是原型与设计工具。完全免费且开源。

Shadcn Studio 影音工作室 Preview your theme changes across different components and layouts. 在不同组件与布局上预览你的主题变更。

smartmockups.com Create product mockups, 200 free mockups. 创建产品样机（mockup），200 个免费样机。

SVGicons.com Free search engine for 312K+ open-source SVG icons with ready-to-use SVG, React, Vue, HTML, and CSS code. 免费搜索引擎，含 31.2 万+ 开源 SVG 图标，提供即用 SVG、React、Vue、HTML 与 CSS 代码。

TeleportHQ 传送总部 Low-code Front-end Design & Development Platform. TeleportHQ is the collaborative front-end platform to instantly create and publish headless static websites. Three free projects, unlimited collaborators, and free code export. 低代码前端设计与开发平台。TeleportHQ 是协作式前端平台，即时创建并发布无头静态网站。三个免费项目、无限协作者与免费代码导出。

Unicorn Platform 独角兽平台 Effortless landing page builder with hosting. One website for free. 带托管的轻松落地页构建器。一个网站免费。

Updrafts.app WYSIWYG website builder for tailwindcss-based designs. Free for non-commercial usage. 面向基于 tailwindcss 设计的 WYSIWYG 网站构建器。非商业用途免费。

Webflow 网络流 WYSIWYG website builder with animations and website hosting. Free for two projects. 带动画与网站托管的 WYSIWYG 网站构建器。两个项目免费。

Webstudio 网络工作室 Open-source alternative to Webflow. The free plan offers unlimited websites on their domain. Five websites with custom domains. Ten thousand page views/month. 2 GB asset storage. Webflow 的开源替代品。免费套餐在其域名上提供无限网站。5 个自定义域名网站。每月 1 万页面浏览。2GB 资源存储。

whimsical.com 异想天开的网站 Collaborative flowcharts, wireframes, sticky notes and mind maps. Create up to 4 free boards. 协作式流程图、线框图、便利贴与思维导图。最多创建 4 个免费看板。

Zeplin 齐普林 Designer and developer collaboration platform. Show designs, assets, and style guides. Free for one project. 设计师与开发者协作平台。展示设计、资源与样式指南。一个项目免费。

WrapPixel 包裹像素 Download High Quality Free and Premium Admin dashboard template created with Angular, React, VueJs, NextJS, and NuxtJS! HTML Themes and UI Kits to create your applications faster! 下载用 Angular、React、VueJs、NextJS 与 NuxtJS 打造的高质量免费与高级管理仪表盘模板！用 HTML 主题与 UI 套件更快创建你的应用！

Themeselection 主题选择 Selected high quality, modern design, professional and easy-to-use Free Admin Dashboard Template, 精选高质量、现代设计、专业且易用的免费管理仪表盘模板。

AdminMart 管理市场 High-Quality Free and Premium Admin Dashboard and Website Templates created with Angular, Bootstrap, React, VueJs, NextJS, and NuxtJS! 用 Angular、Bootstrap、React、VueJs、NextJS 与 NuxtJS 打造的高质量免费与高级管理仪表盘与网站模板！

Data Visualization on Maps

Clockwork Micro 发条微 Map tools that work like clockwork. Fifty thousand free monthly queries (map tiles, db2vector, elevation). 像钟表般精准的地图工具。每月 5 万次免费查询（地图瓦片、db2vector、高程）。

Foursquare 四方 Location discovery, venue search, and context-aware content from Places API and Pilgrim SDK. 来自 Places API 与 Pilgrim SDK 的位置发现、场所搜索与情境感知内容。

geoapify.com Vector and raster map tiles, geocoding, places, routing, isolines APIs. Three thousand free requests/day. 矢量与栅格地图瓦片、地理编码、场所、路由、等时线 API。每天 3000 次免费请求。

geocod.io 地理编码io Geocoding via API or CSV Upload. Two thousand five hundred free queries/day. 通过 API 或 CSV 上传的地理编码。每天 2500 次免费查询。

geocodify.com 地理编码网站 Geocoding and Geoparsing via API or CSV Upload. 10k free queries/month. 通过 API 或 CSV 上传的地理编码与地理解析。每月 1 万次免费查询。

geojs.io Highly available REST/JSON/JSONP IP Geolocation lookup API. 高可用的 REST/JSON/JSONP IP 地理定位查询 API。

Geokeo api Geokeo API Geocoding API with language correction and more. Worldwide coverage. 2,500 free daily queries 带语言纠正等特性的地理编码 API。全球覆盖。每天 2500 次免费查询。

graphhopper.com A free developer package is offered for Routing, Route Optimization, Distance Matrix, Geocoding, and Map Matching. 为路由、路线优化、距离矩阵、地理编码与地图匹配提供免费开发者套餐。

here 这里 APIs and SDKs for maps and location-aware apps. 250k transactions/month for free. 面向地图与位置感知应用的 API 与 SDK。每月 25 万次事务免费。

IP Geolocation IP地理定位 Free DEVELOPER plan available with 30K requests/month. 提供免费 DEVELOPER 套餐，每月 3 万次请求。

ipstack Locate and identify Website Visitors by IP Address 通过 IP 地址定位并识别网站访客。

LatLng 拉丁语 Geocoding, reverse geocoding, places, static maps, and vector map tiles APIs. Free tier includes 3,000 geocoding requests/day, 300 reverse geocoding requests/day, and 100 static map images/day. 地理编码、逆地理编码、场所、静态地图与矢量地图瓦片 API。免费套餐含每天 3000 次地理编码请求、300 次逆地理编码请求与 100 张静态地图图像。

locationiq.com Geocoding, Maps, and Routing APIs. Five thousand requests/day for free. 地理编码、地图与路由 API。每天 5000 次请求免费。

mapbox.com 地图盒网站 Maps, geospatial services and SDKs for displaying map data. 用于显示地图数据的地图、地理空间服务与 SDK。

maps.stamen.com 地图.stamen.com Free map tiles and tile hosting. 免费地图瓦片与瓦片托管。

maptiler.com Maptiler.com Vector maps, map services and SDKs for map visualization. Free vector tiles with weekly updates and four map styles. 用于地图可视化的矢量地图、地图服务与 SDK。免费矢量瓦片每周更新，含 4 种地图样式。

nominatim.org 提名网站 OpenStreetMap's free geocoding service, providing global address search functionality and reverse geocoding capabilities. OpenStreetMap 的免费地理编码服务，提供全球地址搜索功能与逆地理编码能力。

opencagedata.com Geocoding API aggregating OpenStreetMap and other open geo sources. Two thousand five hundred free queries/day. 聚合 OpenStreetMap 与其他开放地理来源的地理编码 API。每天 2500 次免费查询。

osmnames 奥斯姆名称 Geocoding, search results ranked by the popularity of related Wikipedia page. 地理编码，搜索结果按相关维基百科页面的热度排序。

positionstack 位置栈 Free geocoding for global places and coordinates. 25,000 Requests per month for personal use. 面向全球地点与坐标的免费地理编码。个人使用每月 2.5 万次请求。

stadiamaps.com Map tiles, routing, navigation, and other geospatial APIs. Two thousand five hundred free map views and API requests/day for non-commercial usage and testing. 地图瓦片、路由、导航与其他地理空间 API。非商业用途与测试每天 2500 次免费地图浏览与 API 请求。

SqlInt In-browser SQL workspace with free tools including a JOIN visualizer, SQL formatter, CSV/JSON to SQL converters, and practice questions with no account or credit card required. 浏览器内的SQL工作区，提供免费工具，包括JOIN可视化器、SQL格式化工具、CSV/JSON到SQL转换器，以及无需账户或信用卡的练习题。

Package Build System

build.opensuse.org Package build service for multiple distros (SUSE, EL, Fedora, Debian, etc.). 面向多发行版（SUSE、EL、Fedora、Debian 等）的包构建服务。

copr.fedorainfracloud.org Mock-based RPM build service for Fedora and EL. 面向 Fedora 与 EL、基于 Mock 的 RPM 构建服务。

help.launchpad.net 帮助.launchpad.net Ubuntu and Debian build service. Ubuntu 与 Debian 构建服务。

IDE and Code Editing

Android Studio 安卓工作室 Android Studio provides the fastest tools for building apps on every type of Android device. Open Source IDE is free for everyone and the best Android app development. Available for Windows, Mac, Linux, and even ChromeOS! Android Studio 提供在各类 Android 设备上构建应用的最快工具。开源 IDE 对所有人免费，且是最佳 Android 应用开发工具。支持 Windows、Mac、Linux 甚至 ChromeOS！

Apache Netbeans 阿帕奇网络豆 Development Environment, Tooling Platform and Application Framework. 开发环境、工具平台与应用框架。

apiary.io 养蜂场io Collaborative design API with instant API mock and generated documentation (Free for unlimited API blueprints and unlimited users with one admin account and hosted documentation). 带即时 API mock 与生成文档的协作式 API 设计（无限 API blueprint、无限用户，含一个管理员账号与托管文档免费）。

BBEdit BB编辑 BBEdit is a popular and extensible editor for macOS. Free Mode provides a powerful core feature set and an upgrade path to advanced features. BBEdit 是 macOS 上流行且可扩展的编辑器。免费模式提供强大的核心特性集与进阶特性的升级路径。

Binder 活页夹 Turn a Git repo into a collection of interactive notebooks. It is a free public service. 将 Git 仓库转为交互式笔记本集合。这是免费公共服务。

BlueJ 蓝杰 A free Java Development Environment designed for beginners, used by millions worldwide. Powered by Oracle & simple GUI to help beginners. 为初学者设计的免费 Java 开发环境，被全球数百万用户使用。由 Oracle 驱动，带简易 GUI 帮助初学者。

Brackets 括号 Brackets is an open-source text editor specifically designed for web development. It is lightweight, easy to use, and highly customizable. Brackets 是专为 Web 开发设计的开源文本编辑器。轻量、易用且高度可定制。

cacher.io 缓存器io Code snippet organizer with labels and support for 100+ programming languages. 带标签、支持 100+ 编程语言的代码片段管理器。

cocalc.com Collaborative calculation in the cloud. Browser access to full Ubuntu with built-in collaboration and lots of free software for mathematics, science, data science, preinstalled: Python, LaTeX, Jupyter Notebooks, SageMath, scikitlearn, etc. 云中协作计算。浏览器访问完整 Ubuntu，内置协作与大量免费数学、科学、数据科学软件，预装：Python、LaTeX、Jupyter Notebooks、SageMath、scikitlearn 等。

Code::Blocks 代码::块 Free Fortran & C/C++ IDE. Open Source and runs on Windows,macOS & Linux. 免费 Fortran 与 C/C++ IDE。开源，运行于 Windows、macOS 与 Linux。

Codeground 代码库 Free browser IDE and playgrounds for 15+ languages plus Postgres, MySQL, MongoDB, and Redis. Shareable snippets, coding interviews, and cloud workspaces. Free playgrounds need no install. 面向 15+ 语言加 Postgres、MySQL、MongoDB、Redis 的免费浏览器 IDE 与 playground。可分享片段、编码面试与云工作区。免费 playground 无需安装。

codiga.io 科迪加io Coding Assistant that lets you search, define, and reuse code snippets directly in your IDE. Free for individual and small organizations. 让你在 IDE 中直接搜索、定义并重用代码片段的编码助手。个人与小型组织免费。

Components.studio 组件工作室 Code components in isolation, visualize them in stories, test them, and publish them on npm. 隔离编写代码组件，用故事（stories）可视化、测试并发布到 npm。

Eclipse Che 日食车 Web-based and Kubernetes-Native IDE for Developer Teams with multi-language support. Open Source and community-driven. An online instance hosted by Red Hat is available at workspaces.openshift.com. 面向开发者团队、支持多语言的基于 Web 与 Kubernetes 原生的 IDE。开源且社区驱动。Red Hat 在 workspaces.openshift.com 提供在线实例。

ForgeCode 伪造代码 AI-enabled pair programmer for Claude, GPT4 Series, Grok, Deepseek, Gemini and all frontier models. Works natively with your CLI and integrates seamlessly with any IDE. Free tier includes basic AI model access with local processing. 面向 Claude、GPT4 系列、Grok、Deepseek、Gemini 与所有前沿模型的 AI 赋能结对编程器。原生兼容你的 CLI，并无缝集成任意 IDE。免费套餐含基础 AI 模型访问，本地处理。

GetVM 获取虚拟机 Instant free Linux and IDEs chrome sidebar. The free tier includes 5 VMs per day. 即时的免费 Linux 与 IDE Chrome 侧边栏。免费套餐每天含 5 个 VM。

JDoodle 涂鸦 Online compiler and editor for more than 60 programming languages with a free plan for REST API code compiling up to 200 credits per day. 面向 60+ 编程语言的在线编译器与编辑器，免费套餐为 REST API 代码编译每天最多 200 额度。

jetbrains.com Productivity tools, IDEs and deploy tools (aka IntelliJ IDEA, PyCharm, etc). Free license for students, teachers, Open Source and user groups. 生产力工具、IDE 与部署工具（即 IntelliJ IDEA、PyCharm 等）。学生、教师、开源与用户组免费授权。

JSONPlaceholder JSON占位符 Some REST API endpoints that return some fake data in JSON format. The source code is also available if you would like to run the server locally. 返回 JSON 格式假数据的若干 REST API 端点。若想本地运行服务器，源码同样可用。

Lazarus 拉撒路 Lazarus is a Delphi-compatible cross-platform IDE for Rapid Application Development. Lazarus 是兼容 Delphi、面向快速应用开发的跨平台 IDE。

LiveCodes An open-source client-side code playground that supports 90+ languages/frameworks. Projects can be saved, exported, shared, synced, deployed (to GitHub Pages) and embedded in web pages. Mobile-friendly. Can be self-hosted. Free for unlimited usage. No account required. 一个支持90多种语言/框架的开源客户端代码沙盒。项目可以保存、导出、分享、同步、部署（到GitHub Pages）并嵌入网页。移动友好。可以自行托管。免费无限使用。无需账户。

MarsCode 火星密码 A free AI-powered cloud-based IDE. 免费的 AI 驱动云 IDE。

micro-jaymock 微型 jamock Tiny API mocking microservice for generating fake JSON data. 用于生成假 JSON 数据的小型 API mock 微服务。

mockaroo 莫卡鲁 Mockaroo lets you generate realistic test data in CSV, JSON, SQL, and Excel formats. You can also create mocks for back-end API. Mockaroo 让你生成 CSV、JSON、SQL 与 Excel 格式的真实测试数据。也可为后端 API 创建 mock。

Mocklets 小莫克莱茨 an HTTP-based mock API simulator that helps simulate APIs for faster parallel development and more comprehensive testing, with a lifetime free tier. 基于 HTTP 的 mock API 模拟器，帮助模拟 API 以加速并行开发与更全面的测试，含终身免费套餐。

OneCompiler 一个编译器 Free online compiler supporting 70+ languages including Java, Python, C++, JavaScript. 支持 70+ 语言（含 Java、Python、C++、JavaScript）的免费在线编译器。

OnlineGDB 在线GDB A free online ide thats supports 40+ languages and is pre installed with tons of libraries; and also has a debugging option, flags, tutorials, and a QNA page! 支持 40+ 语言、预装大量库的免费在线 IDE，还具调试选项、flags、教程与 QNA 页面！

pterocos 翼龙 a free opensource browser-based coding environment for front-end developers. write html, css and js with a vs code-grade editor (monaco), live preview, scss/typeScript/babel support, and an ai chat assistant for debugging and suggestions. all projects save to local storage. free forever – no account needed. 面向前端开发者的免费开源浏览器编码环境。用 vs code 级编辑器（monaco）编写 html、css 与 js，含实时预览、scss/typeScript/babel 支持，以及用于调试与建议的 AI 聊天助手。所有项目保存到本地存储。永久免费——无需账号。

Paiza 派萨 Develop Web apps in Browser without needing to set up anything. Free Plan offers one server with 24 24-hour lifetime and 4 hours of running time per day with 2 CPU cores, 2 GB RAM, and 1 GB storage. 在浏览器中开发 Web 应用而无需任何设置。免费套餐提供一台服务器，24 小时寿命、每天 4 小时运行时间、2 CPU 核、2GB RAM 与 1GB 存储。

PHPSandbox PHP沙箱 Online development environment for PHP 面向 PHP 的在线开发环境。

Replit 雷普利特 A cloud coding environment for various program languages. 面向多种编程语言的云编码环境。

RunMat 跑步垫 GPU-accelerated numerical computing IDE in the browser. Write and run MATLAB-syntax .m files with automatic GPU acceleration via WebAssembly and WebGPU. No install, no account, no license fees. Open source runtime with CLI, NPM package, and Jupyter kernel support. 浏览器中 GPU 加速的数值计算 IDE。用 WebAssembly 与 WebGPU 编写并运行 MATLAB 语法的 .m 文件，自动 GPU 加速。无需安装、无需账号、无许可费。开源运行时，支持 CLI、NPM 包与 Jupyter 内核。

SoloLearn 独奏学习 A cloud programming playground well-suited for running code snippets. Supports various programming languages. No registration is required for running code, but it is necessary when saving code on their platform. Also offers free courses for beginners and intermediate-level coders. 适合运行代码片段的云编程 playground。支持多种编程语言。运行代码无需注册，但在其平台保存代码需要注册。也提供面向初学者与中级编码者的免费课程。

stackblitz.com Online/Cloud Code IDE to create, edit, & deploy full-stack apps. Support any popular NodeJs-based frontend & backend frameworks. Shortlink to create a new project: https://node.new. 用于创建、编辑并部署全栈应用的在线/云代码 IDE。支持任意流行的基于 NodeJs 的前端 & 后端框架。创建新项目的短链：https://node.new。

Sublime Text 崇高的文字 Sublime Text is a popular, versatile, and highly customizable text editor used for coding and text editing tasks. Sublime Text 是流行、通用且高度可定制的文本编辑器，用于编码与文本编辑任务。

Visual Studio Code 视觉工作室代码 Code editor redefined and optimized for building and debugging modern web and cloud applications. Developed by Microsoft. 为构建与调试现代 Web 和云应用重新定义并优化的代码编辑器。由微软开发。

Visual Studio Community Visual Studio 社区 Fully-featured IDE with thousands of extensions, cross-platform app development (Microsoft extensions available for download for iOS and Android), desktop, web and cloud development, multi-language support (C#, C++, JavaScript, Python, PHP and more). 功能完备的 IDE，含数千扩展、跨平台应用开发（微软提供可下载的 iOS 与 Android 扩展）、桌面、Web 与云开发、多语言支持（C#、C++、JavaScript、Python、PHP 等）。

VSCodium VS钠 Community-driven, without telemetry/tracking, and freely-licensed binary distribution of Microsoft’s editor VSCode 社区驱动、无遥测/追踪、自由许可的 Microsoft 编辑器 VSCode 二进制发行版。

wakatime.com Quantified self-metrics about your coding activity using text editor plugins, limited plan for free. 通过文本编辑器插件量化你的编码活动自我指标，有限免费套餐。

Wave Terminal 波浪终端 Wave is an open-source, cross-platform terminal for seamless workflows. Render anything inline. Save sessions and history. Powered by open web standards. MacOS and Linux. Wave 是开源、跨平台的终端，用于无缝工作流。内联渲染任意内容。保存会话与历史。由开放 Web 标准驱动。支持 MacOS 与 Linux。

Analytics, Events and Statistics

amplitude.com 振幅.com 1 million monthly events, up to 2 apps 每月 100 万事件，最多 2 个应用。

AppFit 应用健身 AppFit is a comprehensive analytics and product management tool designed to facilitate seamless, cross-platform management of analytics and product updates. Free plan includes 10,000 events per month, product journal and weekly insights. AppFit 是综合分析与产品管理工具，旨在促进分析（analytics）与产品更新的跨平台无缝管理。免费套餐含每月 1 万事件、产品日志与每周洞察。

Aptabase 适体数据库 Open Source, Privacy-Friendly, and Simple Analytics for Mobile and Desktop Apps. SDKs for Swift, Kotlin, React Native, Flutter, Electron, and many others. Free for up to 20,000 events per month. 面向移动与桌面应用、开源、注重隐私且简单的分析。支持 Swift、Kotlin、React Native、Flutter、Electron 等 SDK。每月最多 2 万事件免费。

Avo 阿沃 Simplified analytics release workflow. Single-source-of-truth tracking plan, type-safe analytics tracking library, in-app debuggers, and data observability to catch all data issues before you release. Free for two workspace members and 1 hour data observability lookback. 简化的分析发布工作流。单一事实来源追踪计划、类型安全分析追踪库、应用内调试器与数据可观测性，在发布前捕获所有数据问题。2 名工作区成员与 1 小时数据可观测性回溯免费。

Beampipe.io Beampipe is simple, privacy-focussed web analytics. free for up to 5 domains & 10k monthly page views. Beampipe 是简单、注重隐私的 Web 分析。最多 5 个域名与每月 1 万页面浏览免费。

Census 人口普查 Reverse ETL & Operational Analytics Platform. Sync 10 fields from your data warehouse to 60+ SaaS like Salesforce, Zendesk, or Amplitude. 反向 ETL 与运营分析平台。将 10 个字段从你的数据仓库同步到 60+ SaaS，如 Salesforce、Zendesk 或 Amplitude。

Clicky 咔哒声 Website Analytics Platform. Free Plan for one website with 3000 views analytics. 网站分析平台。一个网站、3000 次浏览分析的免费套餐。

counter.dev 计数器开发 Web analytics made simple and therefore privacy friendly. Free or pay what you want by donation. 简单、因而注重隐私的 Web 分析。免费或按捐赠随心付费。

DevDome Cookieless web analytics for WordPress that counts human visitors separately from bots and AI crawlers. Free plan: unlimited sites, 50,000 human pageviews per month, 90 days of data retention. WordPress 无 Cookie 网站分析工具，可分别统计人类访客、机器人及 AI 搜索引擎爬虫。免费计划：无限站点，每月 50,000 次人类页面浏览，数据保留 90 天。

DocBeacon 文档信标 Secure document sharing with document tracking and engagement Analytics. Free plan supports up to 20 PDF documents (10 MB max), 10 contacts, and 2 shares per document with basic analytics for views downloads, time and engagement. 带文档追踪与参与度分析的安全文档共享。免费套餐支持最多 20 个 PDF 文档（最大 10MB）、10 个联系人、每文档 2 次分享，以及基础的分析（浏览、下载、时间与参与度）。

Dwh.dev 德威开发公司 Data Cloud Observability Solution (Snowflake). Free for personal use. 数据云可观测性方案（Snowflake）。个人使用免费。

Expensify 费用化 Expense reporting, free personal reporting approval workflow 费用报销，免费个人报销审批工作流。

getinsights.io Privacy-focused, cookie-free analytics, free for up to 3k events/month. 注重隐私、无 cookie 的分析，每月最多 3000 事件免费。

Gizmo Analytics 小发明分析 Simple analytics for people managing lots of sites. Install manually or let Claude/Cursor do it for you. Free for up to 10k events/month. 面向管理大量站点者的简单分析。手动安装或让 Claude/Cursor 代劳。每月最多 1 万事件免费。

GoatCounter 山羊计数器 GoatCounter is an open-source web analytics platform available as a hosted service (free for non-commercial use) or self-hosted app. It aims to offer easy-to-use and meaningful privacy-friendly web analytics as an alternative to Google Analytics or Matomo. The free tier is for non-commercial use and includes unlimited sites, six months of data retention, and 100k pageviews/month. GoatCounter 是开源 Web 分析平台，可作为托管服务（非商业用途免费）或自托管应用。旨在提供易用、有意义且注重隐私的 Web 分析，作为 Google Analytics 或 Matomo 的替代品。免费套餐为非商业用途，含无限站点、6 个月数据保留与每月 10 万页面浏览。

Google Analytics 谷歌分析 Google Analytics

heap.io 堆.io Automatically captures every user action in iOS or web apps. Free for up to 10K monthly sessions. 自动捕获 iOS 或 Web 应用中的每次用户操作。每月最多 1 万会话免费。

Hightouch 高触感 Hightouch is a Reverse ETL platform that helps you sync customer data from your data warehouse to your CRM, marketing, and support tools. The free tier offers you one destination to sync data to. Hightouch 是反向 ETL 平台，帮助你将客户数据从数据仓库同步到 CRM、营销与支持工具。免费套餐提供 1 个目标用于数据同步。

HitKeep 命中保持 Privacy-focused, open-source web and product analytics platform with a free cloud plan for 3 websites, 3 team members, 60-day data retention, AI analytics, goals, funnels, events, and hits. 注重隐私、开源的 Web 与产品分析平台，含 3 个网站、3 名团队成员、60 天数据保留、AI 分析、目标、漏斗、事件与点击（hits）的免费云套餐。

Hotjar 霍特贾尔 Website Analytics and Reports . Free Plan allows 2000 pageviews/day. One hundred snapshots/day (max capacity: 300). Three snapshot heatmaps can be stored for 365 days. Unlimited Team Members. Also in App and standalone surveys, feedback widgets with screenshots. Free tier allows creating 3 surveys & 3 feedback widgets and collecting 20 responses per month. 网站分析与报告。免费套餐允许每天 2000 页面浏览。每天 100 次快照（最大容量 300）。可存储 3 个快照热图 365 天。无限团队成员。也含应用内与独立调查、带截图的反馈小组件。免费套餐允许创建 3 个调查与 3 个反馈小组件，每月收集 20 份响应。

LogSpot 日志点 Full unified web and product analytics platform, including embeddable analytics widgets and automated robots (slack, telegram, and webhooks). Free plan includes 10,000 events per month. 完整的统一 Web 与产品分析平台，含可嵌入分析小组件与自动化机器人（slack、telegram、webhook）。免费套餐含每月 1 万事件。

Mixpanel 混合面板 100,000 monthly tracked users, unlimited data history and seats, US or EU data residency 每月 10 万追踪用户、无限数据历史与席位、美国或欧盟数据驻留。

Moesif 莫埃西夫 API analytics for REST and GraphQL. (Free up to 500,000 API calls/mo) 面向 REST 与 GraphQL 的 API 分析。（每月最多 50 万 API 调用免费）

PostHog 邮差猪 Full Product Analytics suite free for up to 1m tracked events per month. Also provides unlimited in-App Surveys with 250/month responses. 完整产品分析套件，每月最多 100 万追踪事件免费。也提供每月 250 响应的无限应用内调查。

Repohistory 历史记录 Beautiful dashboard for tracking GitHub repo traffic history longer than 14 days. Free Plan allows users to monitor traffic for a single repository. 追踪 GitHub 仓库流量历史超过 14 天的精美仪表盘。免费套餐允许用户监控单个仓库的流量。

Row Zero 零行 Blazingly fast, connected spreadsheet. Connect directly to data databases, S3, and APIs. Import, analyze, graph, and share millions of rows instantly. Three free (forever) workbooks. 极快、连通的电子表格。直接连接数据库、S3 与 API。即时导入、分析、绘图并分享数百万行。三个免费（永久）工作簿。

Rybbit 雷比特 Open-source and cookieless alternative to Google Analytics that is 10x more intuitive. Free plans has 3,000 monthly events. 比 Google Analytics 直观 10 倍的开源、无 cookie 替代品。免费套餐含每月 3000 事件。

Seline 塞林 Seline is a simple & private website and product analytics. Cookieless, lightweight, independent. Free plan includes 3,000 events per month and provides access to all our features, such as the dashboard, user journeys, funnels, and more. Seline 是简单、私有的网站与产品分析。无 cookie、轻量、独立。免费套餐含每月 3000 事件，并可访问全部特性，如仪表盘、用户旅程、漏斗等。

StatCounter 统计计数器 Website Viewer Analytics. Free plan for analytics of 500 most recent visitors. 网站访客分析。免费套餐分析最近 500 名访客。

Stats4U A visitor counter and web stats service operated from Poland, since 2006. Website owners choose a counter design copy the code and paste it into their site; no account is required. Free without paid plans. Privacy First: Stats4U does not set cookies and Counter data is processed on the operator's own server in the EU. 自2006年以来在波兰运营的访客计数器和网络统计服务。网站所有者选择计数器设计，复制代码并将其粘贴到他们的网站上；无需账户。免费，无付费计划。隐私优先：Stats4U不设置cookies，计数器数据在欧盟的运营商自己的服务器上处理。

Statsig 统计数据 All-in-one platform spanning across analytics, feature flagging, and A/B testing. Free for up to 1m metered events per month. 涵盖分析、功能开关与 A/B 测试的一体化平台。每月最多 100 万计费事件免费。

TraceLog 跟踪日志 AI Analytics for E-commerce. Ask questions in natural language about your analytics, get actionable recommendations and grow your revenue with AI-powered insights. Free for up to 10k events per month. 面向电商的 AI 分析。用自然语言询问你的分析、获得可执行建议，并借 AI 驱动的洞察增长营收。每月最多 1 万事件免费。

Trackingplan 追踪计划 Automatically detect digital analytics, marketing data and pixels issues, maintain up-to-date tracking plans, and foster seamless collaboration. Deploy it to your production environment with real traffic or add analytics coverage to your regression tests without writing code. 自动检测数字分析、营销数据与像素问题，维护最新的追踪计划，并促进无缝协作。用真实流量部署到生产环境，或为回归测试添加分析覆盖，而无需编写代码。

TrackWith Dicloud 迪云追踪 Free lightweight privacy-focused alternative to Google Analytics. Unlimited pageviews, unlimited visitor, unlimited page heatmaps & goal tracking. Free for up to 3 domains and 600 session replay per domain. 免费、轻量、注重隐私的 Google Analytics 替代品。无限页面浏览、无限访客、无限页面热图与目标追踪。最多 3 个域名、每域 600 次会话回放免费。

Umami 鲜味 Simple, fast, privacy-focused, open-source alternative to Google Analytics. 简单、快速、注重隐私、开源的 Google Analytics 替代品。

usabilityhub.com Test designs and mockups on real people and track visitors. Free for one user, unlimited tests 在真实人群上测试设计与样机并追踪访客。1 名用户、无限测试免费。

Visitor Session Recording

FullStory.com 完整故事网 1,000 sessions/month with one month data retention and three user seats. More information here. 每月 1000 会话、1 个月数据保留与 3 个用户席位。更多信息见此处。

howuku.com Track user interaction, engagement, and event. Free for up to 5,000 visits/month 追踪用户交互、参与度与事件。每月最多 5000 次访问免费。

inspectlet.com 检查站 2,500 sessions/month free for one website 一个网站每月 2500 会话免费。

LogRocket.com 日志火箭网 1,000 sessions/month with 30-day retention, error tracking, live mode 每月 1000 会话、30 天保留、错误追踪、实时模式。

Microsoft Clarity 微软清晰度 Session recording completely free with "no traffic limits", no project limits, and no sampling 会话录制完全免费，无流量限制、无项目限制、无采样。

mouseflow.com 500 sessions/month free for one website 一个网站每月 500 会话免费。

OpenReplay.com Open-source session replay with dev tools for bug reproduction, live session for real-time support, and product analytics suite. One thousand sessions/month with access to all features and 7-day retention. 开源会话回放，含用于缺陷复现的开发工具、用于实时支持的活动会话与产品分析套件。每月 1000 会话，可访问全部特性，保留 7 天。

Reactflow.com Per site: 1,000 pages views/day, three heatmaps, three widgets, free bug tracking 每站点：每天 1000 页面浏览、3 个热图、3 个小组件、免费缺陷追踪。

smartlook.com free packages for web and mobile apps (1500 sessions/month), three heatmaps, one funnel, 1-month data history 面向 Web 与移动应用的免费套餐（每月 1500 会话）、3 个热图、1 个漏斗、1 个月数据历史。

UXtweak.com Record and watch how visitors use your website or app. Free unlimited time for small projects 记录并观看访客如何使用你的网站或应用。小项目无限时间免费。

International Mobile Number Verification API and SDK

numverify 数字验证 Global phone number validation and lookup JSON API. 100 API requests/month 全球手机号验证与查询 JSON API。每月 100 次 API 请求。

veriphone 维iPhone Global phone number verification in a free, fast, reliable JSON API. 1000 requests/month 免费、快速、可靠的 JSON API，全球手机号验证。每月 1000 次请求。

Payment and Billing Integration

Adapty.io 适应.io One-stop solution with open-source SDK for mobile in-app subscription integration to iOS, Android, React Native, Flutter, Unity, or web app. Free up to $10k monthly revenue. 带开源 SDK 的一站式方案，用于 iOS、Android、React Native、Flutter、Unity 或 Web 应用的移动应用内订阅集成。每月最多 1 万美元营收免费。

AllRatesToday 今日所有价格 Real-time mid-market exchange rates for 150+ currencies with official JavaScript, Python, and PHP SDKs. Free tier includes 300 requests/month over HTTPS. 150+ 货币的实时中间市场汇率，含官方 JavaScript、Python 与 PHP SDK。免费套餐通过 HTTPS 每月 300 次请求。

Churnkey 彻恩基 Cancel flows (open-sourced), churn metrics, and revenue analytics for subscription businesses. Free forever. 取消流程（已开源）、流失指标与订阅业务的营收分析。永久免费。

Currencyapi 货币API Free currency conversion and exchange rate data API. Free 300 requests per month, 10 requests per minute for private use. 免费货币转换与汇率数据 API。私人使用每月免费 300 次请求、每分钟 10 次。

CurrencyApi 货币API Live Currency Rates for Physical and Cryptocurrencies, delivered in JSON and XML. The free tier offers 1,250 API requests/month. 以 JSON 与 XML 交付的实物与加密货币实时汇率。免费套餐每月 1250 次 API 请求。

CurrencyFreaks 货币怪人 Provides current and historical currency exchange rates. Free DEVELOPER plan available with 1000 requests/month. 提供当前与历史货币汇率。提供免费 DEVELOPER 套餐，每月 1000 次请求。

currencylayer 货币层 Reliable Exchange Rates and Currency Conversion for your Business, 100 API requests/month free. 面向业务的可靠汇率与货币转换，每月 100 次 API 请求免费。

exchangerate-api.com 汇率-api.com An easy-to-use currency conversion JSON API. The free tier updates once per day with a limit of 1,500 requests/month. 易用的货币转换 JSON API。免费套餐每天更新一次，限制每月 1500 次请求。

Exchange Rate API 汇率API Real-time currency rates for 160+ currencies with 60-second updates and official SDKs. Free tier includes 300 requests/month. 160+ 货币的实时汇率，60 秒更新，含官方 SDK。免费套餐每月 300 次请求。

FraudLabsPRO 欺诈实验室PRO Help merchants to prevent payment fraud and chargebacks. Free Micro Plan available with 500 queries/month. 帮助商户防范支付欺诈与拒付（chargeback）。提供免费 Micro 套餐，每月 500 次查询。

FxRatesAPI 外汇汇率API Provides real-time and historical exchange rates. The free tier requires attribution. 提供实时与历史汇率。免费套餐需署名。

Moesif API Monetization Moesif API 货币化 Generate revenue from APIs via usage-based billing. Connect to Stripe, Chargebee, etc. The free tier offers 30,000 events/month. 通过基于用量的计费从 API 创收。连接到 Stripe、Chargebee 等。免费套餐每月 3 万事件。

ParityVend 平价销售 Automatically adjust pricing based on visitor location to expand your business globally and reach new markets (purchasing power parity). The free plan includes 7,500 API requests/month. 根据访客位置自动调整定价以在全球拓展业务并触及新市场（购买力平价）。免费套餐含每月 7500 次 API 请求。

Qonversion All-in-one cross-platform subscription management platform offering analytics, A/B testing, Apple Search Ads, remote configs, and growth tools for optimizing in-app purchases and monetization. Compatible with iOS, Android, React Native, Flutter, Unity, Cordova, Stripe, and web. Free up to $10k in monthly tracked revenue. 一体化跨平台订阅管理平台，提供分析、A/B 测试、Apple Search Ads、远程配置与优化应用内购买与变现的增长工具。兼容 iOS、Android、React Native、Flutter、Unity、Cordova、Stripe 与 Web。每月最多 1 万美元追踪营收免费。

RevenueCat 收入猫 Hosted backend for in-app purchases and subscriptions (iOS and Android). Free up to $2.5k/mo in tracked revenue. 面向应用内购买与订阅（iOS 与 Android）的托管后端。每月最多 2500 美元追踪营收免费。

vatlayer 瓦特莱耶 Instant VAT number validation and EU VAT rates API, free 100 API requests/month 即时增值税号验证与欧盟增值税率 API，每月免费 100 次 API 请求。

Docker Related

Appish 阿皮什 Host Docker containers for demos with just a docker push. Free tier includes 1 slot with 2-hour sessions. 仅用 docker push 即可托管演示用 Docker 容器。免费套餐含 1 个槽、2 小时会话。

Container Registry Service 容器注册服务 Harbor based Container Management Solution. The free tier offers 1 GB of storage for private repositories. 基于 Harbor 的容器管理方案。免费套餐为私有仓库提供 1GB 存储。

Docker Hub 码头工人中心 One free private repository and unlimited public repositories to build and store Docker images 一个免费私有仓库与无限公开仓库，用于构建与存储 Docker 镜像。

quay.io 码头io Build and store container images with unlimited free public repositories 构建并存储容器镜像，含无限免费公开仓库。

ttl.sh Anonymous & ephemeral Docker image registry 匿名、临时性的 Docker 镜像仓库

Dev Blogging Sites

AyeDot 耶点 Share your ideas, knowledge, and stories with the world for Free in the form of Modern multimedia short-format Miniblogs. 以现代富媒体短格式 MiniBlog 形式，向全世界免费分享你的想法、知识与故事

BearBlog 熊博客 Minimalist, Markdown-powered blog and website builder. 极简、基于 Markdown 的博客与网站构建器

Dev.to 开发者 Where programmers share ideas and help each other grow. 程序员分享想法、互助成长的社区

Hashnode 哈希节点 Hassle-free Blogging Software for Developers!. 面向开发者的零烦恼博客软件

Medium 中等的 Get more thoughtful about what matters to you. 关注对你重要的事物，获取更有深度的内容

JustBlogged 刚写博客 Free blogging platform with custom domain support, and fast global performance. 支持自定义域名的免费博客平台，具备快速的全球访问性能

Commenting Platforms

GraphComment 图评 GraphComment is a comments platform that helps you build an active community from the website’s audience. 评论平台，帮助你把网站访客转化为活跃的社区

IntenseDebate 激烈的辩论 A feature-rich comment system for WordPress, Tumblr, Blogger, and many other website platforms. 功能丰富的评论系统，支持 WordPress、Tumblr、Blogger 等平台

Remarkbox 备注框 Open source hosted comments platform, pay what you can for "One moderator on a few domains with complete control over behavior & appearance" 开源托管评论平台，对“少量域名上单一版主、完全掌控行为与外观”采取按需付费

Utterances 言语 A lightweight comments widget built on GitHub issues. Use GitHub issues for blog comments, wiki pages, and more! 基于 GitHub Issues 的轻量级评论组件，用 Issue 做博客评论、Wiki 等

Screenshot APIs

ApiFlash APIFlash A screenshot API based on Aws Lambda and Chrome. Handles full page, captures timing, and viewport dimensions. 基于 AWS Lambda 与 Chrome 的截图 API，支持整页、定时与视口尺寸

microlink.io 微链接io It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. 50 requests/day every day free. 将任意网站转为数据：元标签归一化、美观链接预览、抓取与截图服务。每日 50 次免费

PhantomJsCloud 幻云 Browser automation and page rendering. Free Tier offers up to 500 pages/day. Free Tier since 2017. 浏览器自动化与页面渲染，免费层每天最多 500 页，自 2017 年起提供

Ironfang Render UK-based screenshot, PDF, image, QR code and clip rendering API with reusable templates and signed URLs. 250 free renders a month with no payment details needed to get started. 基于英国的截图、PDF、图像、QR码和剪辑渲染API，具有可重复使用的模板和签名URL。每月250次免费渲染，无需支付详情即可开始。

screenshotbase.com 截图库 300 free screenshots / month. Take screenshots from any url. Fast, free & scalable. 每月 300 次免费截图，可从任意 URL 截图，快速、免费、可扩展

screenshotlayer.com Screenshotlayer.com Capture highly customizable snapshots of any website. Free 100 snapshots/month 为任意网站捕获高度可定制的快照，免费每月 100 张

screenshotmachine.com 截图机器网站 Capture 100 snapshots/month, png, gif and jpg, including full-length captures, not only home page 每月 100 张快照，支持 png/gif/jpg 及整页长截图，不仅限于首页

Screenshot Scout 截图侦察 Screenshot API for developers. Clean, production-ready screenshots from any URL in one request. Free plan includes 200 screenshots per month, forever. 面向开发者的截图 API，一次请求即可从任意 URL 获取干净、可用于生产的截图。免费计划每月 200 张，永久有效

Shotpipe 射击管 Screenshot and Open Graph image API built for static sites. Free tier includes 100 renders/month, no card required. cached renders are free. 为静态站点打造的截图与 Open Graph 图片 API，免费层每月 100 次渲染，无需绑卡，缓存渲染免费

SnapAPI 快照API Screenshot, video recording, PDF generation, and web data extraction API. Free plan includes 200 screenshots/month. 截图、录屏、PDF 生成与网页数据提取 API，免费计划每月 200 张截图

thumbnail.ws 缩略图.ws API for generating thumbnails of websites. Free 1,000 requests/month. 生成网站缩略图的 API，免费每月 1,000 次请求

Flutter Related and Building IOS Apps without Mac

CodeMagic 代码魔法 Codemagic is a fully hosted and managed CI/CD for mobile apps. You can build, test, and deploy with a GUI-based CI/CD tool. The free tier offers 500 free minutes/month and a Mac Mini instance with 2.3 GHz and 8 GB of RAM. 全托管的移动应用 CI/CD，可用图形化工具构建、测试、部署。免费层每月 500 分钟，提供 2.3GHz/8GB 的 Mac Mini 实例

FlutLab 流体实验室 FlutLab is a modern Flutter online IDE and the best place to create, debug, and build cross-platform projects. Build iOS (Without a Mac) and Android apps with Flutter. 现代 Flutter 在线 IDE，是创建、调试、构建跨平台项目的最佳场所，可用 Flutter 构建 iOS（无需 Mac）与 Android 应用

FlutterFlow 颤振流 FlutterFlow is a browser-based drag-and-drop interface to build mobile app using flutter. 基于浏览器的拖拽式界面，用 Flutter 构建移动应用

Privacy Management

Bearer 承载者 Helps implement privacy by design via audits and continuous workflows so that organizations comply with GDPR and other regulations. The free tier is limited to smaller teams and the SaaS version only. 通过审计与持续工作流落实“隐私设计”，帮助组织符合 GDPR 等法规。免费层限小型团队，仅 SaaS 版

Concord 和睦 Full data privacy platform, including consent management, privacy request handling (DSARs), and data mapping. Free tier includes core consent management features and they also provide a more advanced plan for free to verified open source projects. 完整的数据隐私平台，含同意管理、隐私请求处理（DSAR）与数据映射。免费层含核心同意管理功能，并为经认证的开源项目提供更高阶的免费方案

Cookiefirst Cookie优先 Cookie banners, auditing, and multi-language consent management solution. The free tier offers a one-time scan and a single banner. Cookie 横幅、审计与多语言同意管理方案，免费层提供一次性扫描与单个横幅

Iubenda 尤本达 Privacy and cookie policies and consent management. The free tier offers limited privacy and cookie policy as well as cookie banners. 隐私与 Cookie 政策及同意管理，免费层提供受限的隐私/Cookie 政策与 Cookie 横幅

Ketch 双桅帆船 Consent management and privacy framework tool. The free tier offers most features with a limited visitor count. 同意管理与隐私框架工具，免费层提供大部分功能，但访客数受限

Miscellaneous

BinShare.net Create & share code or binaries. Available to share as a beautiful image e.g. for Twitter / Facebook post or as a link e.g. for chats or forums. 创建并分享代码或二进制文件，可分享为精美图片（如 Twitter/Facebook 帖子）或链接（如聊天/论坛）

Blynk 布林克 A SaaS with API to control, build & evaluate IoT devices. Free Developer Plan with 5 devices, Free Cloud & data storage. Mobile Apps are also available. 带 API 的 SaaS，用于管控、构建与评估 IoT 设备。免费开发者计划含 5 台设备、免费云与数据存储，亦提供移动 App

cron-job.org Online cronjobs service. Unlimited jobs are free of charge. 在线定时任务服务，无限任务免费

Cronhooks 克朗钩子 Schedule on-time or recurring webhooks. The free plan allows 5 ad-hoc schedules. 定时或周期性触发 Webhook，免费计划允许 5 个临时调度

datelist.io 日期列表.io Online booking / appointment scheduling system. Free up to 5 bookings per month, includes 1 calendar 在线预约/日程安排系统，免费每月最多 5 次预约，含 1 个日历

FOSSA 窝 Scalable, end-to-end management for third-party code, license compliance and vulnerabilities. 可扩展的端到端第三方代码、许可证合规与漏洞管理

Hook Relay 挂钩继电器 Add webhook support to your app without the hassles: done-for-you queueing, retries with backoff, and logging. The free plan has 100 deliveries per day, 14-day retention, and 3 hook endpoints. 为你的应用免麻烦地添加 Webhook 支持：自带队列、退避重试与日志。免费计划每天 100 次投递、保留 14 天、3 个 Webhook 端点

Hosting Checker 托管检查器 Check hosting information such as ASN, ISP, location and more for any domain, website or IP address. Also includes multiple hosting and DNS-related tools. 查询任意域名、网站或 IP 的托管信息（ASN、ISP、位置等），并含多种托管与 DNS 相关工具

newreleases.io Receive notifications on email, Slack, Telegram, Discord, and custom webhooks for new releases from GitHub, GitLab, Bitbucket, Python PyPI, Java Maven, Node.js NPM, Node.js Yarn, Ruby Gems, PHP Packagist, .NET NuGet, Rust Cargo and Docker Hub. 通过邮件、Slack、Telegram、Discord 及自定义 Webhook，获取 GitHub、GitLab、Bitbucket、PyPI、Maven、NPM、Yarn、RubyGems、Packagist、NuGet、Cargo、Docker Hub 的新版本通知

PDFMonkey PDF猴子 Manage PDF templates in a dashboard, call the API with dynamic data, and download your PDF. Offers 300 free documents per month. 在仪表盘中管理 PDF 模板，调用 API 传入动态数据并下载 PDF，每月 300 份免费

Pika Code Screenshots 皮卡代码截图 Create beautiful, customizable screenshots from code snippets and VSCode using the extension. 用扩展从代码片段和 VSCode 创建美观、可定制的截图

QuickType.io Quickly auto-generate models/class/type/interface and serializers from JSON, schema, and GraphQL for working with data quickly & safely in any programming language. Convert JSON into gorgeous, typesafe code in any language. 从 JSON、Schema、GraphQL 快速自动生成模型/类/类型/接口与序列化器，在任意语言安全、快速地处理数据，将 JSON 转为漂亮且类型安全的代码

readme.com 自述文件.com Beautiful documentation made easy, free for Open Source. 轻松生成美观文档，开源项目免费

redirect.pizza 重定向.pizza Easily manage redirects with HTTPS support. The free plan includes 10 sources and 100,000 hits per month. 轻松管理带 HTTPS 支持的跳转，免费计划含 10 个来源与每月 10 万次命中

redirection.io 重定向.io SaaS tool for managing HTTP redirections for businesses, marketing and SEO. 面向企业、营销与 SEO 的 HTTP 重定向管理 SaaS 工具

redirs.com 雷迪尔斯.com Easy domain redirects with auto-SSL, analytics, and URL path forwarding. Free for basic use (up to 5 domains). 带自动 SSL、分析与 URL 路径转发的简易域名跳转，基础使用免费（最多 5 个域名）

RedirHub 红迪集线器 API-first URL redirect infrastructure with custom nameservers, edge network, HTTPS, and proactive link monitoring. Free plan includes 2 hostnames, 100K requests per month, auto-SSL, path forwarding, and REST API access. API 优先的 URL 跳转基础设施，支持自定义 NS、边缘网络、HTTPS 与主动链接监控。免费计划含 2 个主机名、每月 10 万请求、自动 SSL、路径转发与 REST API

ReqBin 请求Bin Post HTTP Requests Online. Popular Request Methods include GET, POST, PUT, DELETE, and HEAD. Supports Headers and Token Authentication. Includes a basic login system for saving your requests. 在线发送 HTTP 请求，支持 GET/POST/PUT/DELETE/HEAD，含请求头与令牌鉴权，并有保存请求的基础登录系统

Smartcar API 智能车API An API for cars to locate, get fuel tank, battery levels, odometer, unlock/lock doors, etc. 面向汽车的 API，可定位、获取油量/电量、里程、上锁/解锁车门等

Sunrise and Sunset 日出和日落 Get sunrise and sunset times for a given longitude and latitude. 获取指定经纬度的日出与日落时间

superfeedr.com Real-time PubSubHubbub compliant feeds, export, analytics. Free with less customization 实时、符合 PubSubHubbub 的订阅源，支持导出与分析，免费且自定义程度较低

SurveyMonkey.com Create online surveys. Analyze the results online. The free plan allows only 10 questions and 100 responses per survey. 创建在线问卷并在线分析结果，免费计划每份问卷仅限 10 个问题与 100 份回复

SYNCDATE 同步数据 Two-way Google Calendar sync. Free tier: 2 accounts, unlimited events. 双向 Google 日历同步，免费层：2 个账户、不限事件数

UUID Generator UUID生成器 Generate UUID v1, UUID v4, UUID v7, GUID, Nil UUIDs, CUID v1/v2, NanoID, and ULID instantly with enterprise-grade 即时生成 UUID v1/v4/v7、GUID、Nil UUID、CUID v1/v2、NanoID 与 ULID，达到企业级标准

Versionfeeds 版本提要 Custom RSS feeds for releases of your favorite software. Have the latest versions of your programming languages, libraries, or loved tools in one feed. (The first 3 feeds are free) 为常用软件发布生成自定义 RSS 订阅源，在一处掌握编程语言、库、工具的版本动态（前 3 个源免费）

Remote Desktop Tools

Parsec 秒差距 Free for installation on unlimited number of devices(for personal use) and allows up to 20 connections to a single device at once. (great for gaming/low latency work) 个人使用可无限设备安装、同时最多 20 个连接（适合游戏/低延迟场景），免费

AnyDesk 任意桌面 Free for 3 devices, no limits on the number and duration of sessions 免费支持 3 台设备，会话数量与时长均不限

Getscreen.me 获取屏幕我 Free for 2 devices, no limits on the number and duration of sessions 免费支持 2 台设备，会话数量与时长均不限

RemSupp 雷姆·苏普 On-demand support and permanent access to devices (2 sessions/day for free) 按需支持与设备常驻访问，免费每天 2 个会话

RustDesk 铁锈桌 Open source virtual/remote desktop infrastructure for everyone! 人人可用的开源虚拟/远程桌面基础设施

Other Free Resources

get.localhost.direct 获取.localhost.direct A better `*.localhost.direct` Wildcard public CA signed SSL cert for localhost development with sub-domain support 为本地开发提供更好的 `*.localhost.direct` 通配符、由公共 CA 签名的 SSL 证书，支持子域名

GitHub Education GitHub 教育 Collection of free services for students. Registration required. 面向学生的免费服务合集，需注册

Glob tester 全局测试仪 A website that allows you to design and test glob patterns. It also provides resources to learn glob patterns. 设计并测试 glob 模式的网站，亦提供学习 glob 模式的资源

Killer Coda 杀手尾声 Interactive playground in your browser to study Linux, Kubernetes, Containers, Programming, DevOps, Networking 浏览器内的交互式演练场，可学习 Linux、Kubernetes、容器、编程、DevOps、网络

Microsoft 365 Developer Program Microsoft 365 开发人员计划 Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day Microsoft 365 E5 Subscription (Windows excluded) which is renewable. It is renewed if you're active in development(measured using telemetry data & algorithms). 获取构建 Microsoft 365 解决方案所需的免费沙箱、工具与资源。提供 90 天可续期的 Microsoft 365 E5 订阅（不含 Windows），依据开发活跃度续期

MySQL Visual Explain MySQL 可视化解释 Easy-to-understand and free MySQL EXPLAIN output visualizer to optimize slow queries. 易用的免费 MySQL EXPLAIN 输出可视化工具，用于优化慢查询

RedHat for Developers 面向开发人员的红帽 Free access to Red Hat products including RHEL, OpenShift, CodeReady, etc. exclusively for developers. Individual plan only. Free e-books are also offered for reference. 开发者专享的 Red Hat 产品免费访问（含 RHEL、OpenShift、CodeReady 等），仅个人计划，另提供免费电子书

sandbox.httpsms.com Send and receive test SMS messages for free. 免费收发测试短信

SimpleBackups.com Backup automation service for servers and databases (MySQL, PostgreSQL, MongoDB) stored directly into cloud storage providers (AWS, DigitalOcean, and Backblaze). Provides a free plan for 1 backup. 服务器与数据库（MySQL、PostgreSQL、MongoDB）备份自动化服务，直接存至云存储（AWS、DigitalOcean、Backblaze），提供 1 个备份的免费计划

SimpleRestore 简单恢复 Hassle-free MySQL backup restoration. Restore MySQL backups to any remote database without code or a server. 省心的 MySQL 备份恢复，无需代码或服务器即可将备份恢复到任意远程数据库

SnapShooter Backup solution for DigitalOcean, AWS, LightSail, Hetzner, and Exoscale, with support for direct database, file system and application backups to s3 based storage. Provides a free plan with daily backups for one resource. DigitalOcean、AWS、LightSail、Hetzner 和 Exoscale 的备份解决方案，支持直接将数据库、文件系统和应用程序备份到基于 s3 的存储。提供免费计划，为一种资源提供每日备份。