AI-Powered Documentation Tools

• DeepDocs - AI documentation generator for APIs.
• QuickType - AI-powered JSON schema generation and documentation.
• Docstring AI - AI-assisted documentation generator for code.
• CodeDoc AI - AI-powered documentation generator for programming languages.
• DeepDocs - AI documentation generator for APIs.

API Design Tools

• Apicurio Studio - Open-source API design studio with documentation features.
• API Sprout - Lightweight, embeddable API mock server for prototyping documentation.
• Prism - Open-source HTTP mock server with API documentation features.

API Gateways with Doc Features

• Kong - API gateway with documentation portal features.
• Tyk - API gateway with documentation capabilities.
• APIGateway - Amazon's API gateway with documentation features.
• Apigee - Google Cloud's API management platform with documentation.
• WSO2 API Manager - Open source API management platform with documentation portal.

API Monitoring Tools

• API Metrics - API analytics platform with documentation usage tracking.
• Moesif - API analytics and monitoring service with documentation engagement tracking.
• RapidAPI Analytics - Analytics platform for API usage with documentation tracking.
• DocOps - Documentation analytics and optimization platform.
• APImetrics - API performance monitoring with documentation usage analytics.

API Testing with Doc Features

• SoapUI - API testing tool with documentation features for REST and SOAP APIs.
• Pact - Contract testing tool with documentation for microservices.
• Dredd - API testing tool that validates API descriptions against implementation.
• HTTPie - Command-line HTTP client with documentation generation capabilities.
• REST-Assured - Java testing library with documentation features for REST APIs.
• Karate - API test automation with documentation capabilities.
• Chakram - API testing framework with documentation features.

Complete Platforms

• Apidog - An integrated platform for API design, debugging, testing, documentation, and mocking. Offers collaborative features specifically tailored for API development teams.
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• Postman - API platform for building and using APIs with features for request building, automated testing, and documentation generation.
• SwaggerHub - Collaborative platform for API design and documentation built around the OpenAPI Specification.
• Stoplight - A design-first API platform with visual modeling, documentation, and testing tools.
• Insomnia - Open-source API client with design, testing, and documentation capabilities.
• ReadMe - Personalized and interactive API documentation platform with analytics.
• Apiary - API design and documentation platform with mock server capabilities.
• RapidAPI - API marketplace with documentation features for API providers.
• Hoppscotch - Open source API development ecosystem with documentation features.
• SwaggerHub - Collaborative platform for API design and documentation built around the OpenAPI Specification.

Documentation Generators

• Redocly - Tools for creating, managing, and publishing API documentation built on OpenAPI.
• OpenAPI Generator - Generate documentation and client libraries from OpenAPI specifications.
• ApiDoc - Documentation generator from API annotations in source code.
• JSDoc - API documentation generator for JavaScript.
• Swagger Codegen - Generate documentation and client libraries from Swagger definitions.
• Docusaurus - React-based static site generator optimized for documentation websites.
• Javadoc - Documentation generator for Java APIs.
• TypeDoc - Documentation generator for TypeScript projects.
• NSwag - Swagger/OpenAPI toolchain for .NET with documentation generation capabilities.
• drf-yasg - Automated generation of Swagger/OpenAPI documentation for Django REST Framework APIs.
• GraphDoc - Static page generator for GraphQL schema documentation.
• Doctave - Documentation site generator with a focus on API documentation.
• Raml2Html - RAML to HTML documentation generator.
• Doxygen - Documentation generator for multiple programming languages.

Documentation Hosting

• GitHub Pages - Free hosting for project documentation directly from a GitHub repository.
• GitBook - Modern documentation platform for teams.
• ReadTheDocs - Documentation hosting platform with full-text search.
• Netlify - Platform for hosting static documentation sites.
• Surge - Static web publishing for documentation sites.
• Vercel - Platform for hosting documentation with seamless Git integration.
• Heroku - Cloud platform that can be used to host documentation apps.
• Cloudflare Pages - JAMstack platform for hosting documentation sites.

Documentation Templates

• API Documentation Template - Template for REST API documentation.
• API Blueprint Examples - Examples of API Blueprint documentation.
• OpenAPI Examples - Example OpenAPI specifications.
• HAL Examples - Examples of HAL documentation.
• API Guidelines - Microsoft's guidelines for REST API design and documentation.

IDE Extensions & Plugins

• OpenAPI (Swagger) Editor for VS Code - OpenAPI editor for Visual Studio Code.
• OpenAPI Preview for VS Code - Preview OpenAPI documentation in Visual Studio Code.
• Swagger Viewer for VS Code - Preview Swagger documentation in VS Code.
• Swagger Plugin for IntelliJ - Swagger integration for IntelliJ IDEA.
• ReDoc for VS Code - ReDoc preview for Visual Studio Code.
• OpenAPI Editor for Eclipse - OpenAPI editor for Eclipse IDE.

Language-Specific Tools

• Godoc - Documentation generator for Go projects.
• pydoc - Documentation generator for Python.
• Yard - Documentation generator for Ruby.
• Sandcastle - Documentation compiler for .NET projects.
• ESDoc - API documentation generator for JavaScript.
• Swiftdoc - Documentation generator for Swift.
• Jazzy - Documentation generator for Swift and Objective-C.
• PHPDoc - Documentation generator for PHP projects.
• PHPDoc - Documentation generator for PHP projects.
• Sphinx - Python documentation generator with API doc support.

Markdown Tools

• MkDocs - Static site generator for documentation using Markdown.
• Docsify - Documentation site generator without static HTML files.
• Markdown-it - Markdown parser with plugins for documentation features.
• Remarkable - Markdown parser with extension support for documentation.
• Docz - Documentation generator using Markdown and JSX.

Mock Servers

• Mockoon - Mock API server with documentation features.
• Prism - HTTP mock server for OpenAPI specs.
• JSON Server - Fake REST API server with documentation features.
• WireMock - Flexible API mocking with documentation capabilities.
• MockServer - Easy mocking of REST and SOAP services for documentation.

Open Source Tools

• Swagger UI - Interactive API documentation generator that visualizes OpenAPI specifications.
• ReDoc - OpenAPI/Swagger documentation generator creating responsive, three-panel documentation.
• Slate - Beautiful static API documentation based on Markdown.
• DapperDox - Documentation generator for OpenAPI specifications.
• Docbox - REST API documentation system built with React.
• LucyBot - Generate API documentation websites from OpenAPI specifications.
• widdershins - OpenAPI/Swagger/AsyncAPI definition to Markdown/Slate/HTML documentation.
• Spectaql - Documentation generator for GraphQL APIs.
• DevDocs - Open-source API documentation browser.
• APITree - An open-source tool for visualizing and documenting APIs.

Resources

• API Documentation Guide - A guide to API documentation by Tom Johnson.
• OpenAPI Map - Visual representation of the OpenAPI Specification.
• DevDocs - Unified API documentation browser.
• API Stylebook - Collection of resources for API designers.
• Nordic APIs Blog - Articles on API development and documentation best practices.
• The API Handyman - Blog with API design and documentation best practices.
• Swagger Blog - Articles about API development and documentation.
• REST API Tutorial - Tutorial on REST API design and documentation.
• API Evangelist - Blog about API strategy and documentation.
• API-University - Educational resources for API documentation and design.
• JSON Schema Tools - List of tools for working with JSON Schema.
• REST API Design Rulebook - Book on REST API design principles.
• API Documentation Best Practices - Article on best practices for API documentation.
• GraphQL Documentation Guide - Guide to documenting GraphQL APIs.
• RAML Documentation Guide - Guide to documenting APIs with RAML.

Specification Tools

• OpenAPI (Swagger) Specification - The standard for describing RESTful APIs.
• API Blueprint - A documentation-oriented API description language.
• RAML - RESTful API Modeling Language for designing RESTful APIs.
• JSON Schema - Vocabulary that allows validation of JSON documents.
• GraphQL - Query language and runtime for APIs that provides a complete description of the data available.
• WSDL - XML-based interface description language for SOAP services.
• gRPC - High-performance RPC framework with built-in documentation via Protocol Buffers.
• AsyncAPI - Specification for event-driven APIs.
• HAL - Hypermedia Application Language for building hypermedia-driven APIs.
• OpenRPC - Specification for JSON-RPC 2.0 APIs.

Static Site Generators for Docs

• VuePress - Vue-powered static site generator with API documentation features.
• Jekyll - Static site generator often used for API documentation.
• Hexo - Fast and simple static site generator with documentation themes.
• Hugo - Fast static site generator with documentation themes and features.
• Gatsby - React-based static site generator for documentation sites.

Visual Documentation Tools

• Mermaid - Diagramming and charting tool for documentation.
• API Flow - Visual API designer with documentation export capabilities.
• Postman Visualizer - Visualization tool for API responses within Postman.
• Flexible REST API Visualizer - Visualization tool for REST APIs.
• Swagger UI Themes - Themes for Swagger UI documentation.
• Speccy - OpenAPI specification linter with visualization features.
• Swagger Inspector - API testing tool with documentation generation features.
• Postman Visualizer - Visualization tool for API responses within Postman.
• Postman Visualizer - Visualization tool for API responses within Postman.