DevDocs - API Documentation Browser

•    Ruby

DevDocs combines multiple API documentations in a fast, organized, and searchable interface.Unless you wish to contribute to the project, I recommend using the hosted version at devdocs.io. It's up-to-date and works offline out-of-the-box.

Zeal - Offline documentation browser inspired by Dash

•    C++

Zeal is an offline documentation browser for software developers.

docfx - Tools for building and publishing API documentation for .NET projects

•    CSharp

DocFX makes it extremely easy to generate your developer hub with API reference, landing page, and how-to.We currently support C# and VB projects.

NelmioApiDocBundle - Generates documentation for your REST API from annotations

•    PHP

The NelmioApiDocBundle bundle allows you to generate a decent documentation for your APIs. To migrate from 2.x to 3.0, just follow our guide.

flasgger - Easy Swagger UI for your Flask API

•    Python

Flasgger is a Flask extension to extract OpenAPI=Specification from all Flask views registered in your API. Flasgger also comes with SwaggerUI embedded so you can access http://localhost:5000/apidocs and visualize and interact with your API resources.

api-development-tools - :books: A collection of useful resources for building RESTful HTTP+JSON APIs

This is a collection of useful resources for building RESTful HTTP+JSON APIs. There are a lot of good tools and entire ecosystems out there! It can be overwhelming not knowing what options are available, so you can use this as a reference starting point. Please write a brief one-sentence summary when adding a new resource.

ReDoc - 📘 OpenAPI/Swagger-generated API Reference Documentation

•    TypeScript

IMPORTANT NOTE: if you work with untrusted user spec, use untrusted-spec option to prevent XSS security risks.

Swagger - The World's Most Popular API Framework

•    Java

Swagger is a powerful open source framework backed by a large ecosystem of tools that helps you design, build, document, and consume your RESTful APIs. The goal of Swagger is to define a standard, language-agnostic interface to REST APIs which allows both humans and computers to discover and understand the capabilities of the service without access to source code, documentation, or through network traffic inspection.

apidoc - RESTful web API Documentation Generator.

•    Javascript

Generates a RESTful web API Documentation.apiDoc creates a documentation from API descriptions in your source code. It has support of API history, with that various API version levels can be compared.So it can be retraced what changed in the API since the last version.

SLATE - Beautiful static documentation for your API

•    Javascript

Slate helps you create beautiful, intelligent, responsive API documentation. Slate is responsive, so it looks great on tablets, phones, and even in print. The description of your API is on the left side of your documentation, and all the code examples are on the right side. It supports Syntax highlighting, Markdown, RTL support and lot more.

json-schema-spec - The JSON Schema I-D sources

•    Makefile

JSON Schema is a vocabulary that allows you to validate, annotate, and manipulate JSON documents. This repository contains the sources for the work in progress of the next set of JSON Schema IETF Internet Draft (I-D) documents. For the latest released I-Ds, please see the Specification page on the website.

devdocs - API Documentation Browser

•    Ruby

DevDocs combines multiple API documentations in a fast, organized, and searchable interface. Unless you wish to contribute to the project, I recommend using the hosted version at devdocs.io. It's up-to-date and works offline out-of-the-box.

eoLinker-AMS-Lite-For-PHP - 中国最大的API接口管理平台，3.x开源发行版，支持多国语言[英语、简体中文、繁体中文]

•    PHP

中国最大的API接口管理平台，3.x开源发行版，支持多国语言[英语、简体中文、繁体中文]

Wyam - A modular static content and static site generator.

•    CSharp

Wyam is a simple to use, highly modular, and extremely configurable static content generator that can be used to generate web sites, produce documentation, create ebooks, and much more. Since everything is configured by chaining together flexible modules (that you can even write yourself), the only limits to what it can create are your imagination. For more information see Wyam.io.

graphql-voyager - 🛰️ Represent any GraphQL API as an interactive graph

•    TypeScript

Represent any GraphQL API as an interactive graph. It's time to finally see the graph behind GraphQL. You can also explore number of public GraphQL APIs from our list. GraphQL Voyager exports Voyager React component and helper init function. If used without module system it is exported as GraphQLVoyager global variable.

JSDoc - An API documentation generator for JavaScript

•    Javascript

JSDoc 3 is an API documentation generator for JavaScript, similar to Javadoc or phpDocumentor. You add documentation comments directly to your source code, right alongside the code itself. The JSDoc tool will scan your source code and generate an HTML documentation website for you.

rest-layer - REST Layer, Go (golang) REST API framework

•    Go

REST APIs made easy.REST Layer is an API framework heavily inspired by the excellent Python Eve. It helps you create a comprehensive, customizable, and secure REST (graph) API on top of pluggable backend storages with no boiler plate code so you can focus on your business logic.

Robinhood - Unofficial Documentation of Robinhood Trade's Private API

Robinhood is a commission-free, online securities brokerage. As you would expect, being an online service means everything is handled through a request that is made to a specific URL. Before I go too far, I must say that this is a big, messy work in progress. I'll continue to update this as I figure more out. Sections marked TODO are in my head but I haven't found the time to describe them yet. Work in progress and all.

RAML - The simplest way to design APIs

RAML is a language for the definition of HTTP-based APIs that embody most or all of the principles of Representational State Transfer (REST). The RAML specification (this document) defines an application of the YAML 1.2 specification that provides mechanisms for the definition of practically-RESTful APIs, while providing provisions with which source code generators for client and server source code and comprehensive user documentation can be created.

ApiDoc

ApiDoc is a library for creating your own API documentation similar to the MSDN directly from your assembly and /// Xml comments without source code.