Code

Below is a collection of libraries and services that support OAuth 2.0. If you would like to make any changes to this page, you can edit this page.

Server Libraries

Java
- MitreID (with OpenID Connect)
- Spring Security OAuth
- Apis Authorization Server (v2-31)
- Restlet Framework (draft 30)
- Apache CXF
- Tokens: Java library for conveniently verifying and storing OAuth 2.0 service access tokens.
- Light OAuth2 - The fastest, lightest and cloud native OAuth 2.0 microservices
PHP
- PHP OAuth2 Server and Demo
- PHP OAuth 2.0 Auth and Resource Server and Demo
- PHP OAuth2.0 for Silex and Demo
- PHP OAuth2.0 for Symfony and Demo
- Nette OAuth2 provider for Nette framework and Nette REST API bundle
Python
- HHS OAuth2 Server (Healthcare Focused)
- Python OAuth 2.0 Client + Server Library
- Django OAuth Toolkit (DOT) is an OAuth2 Provider for Django built upon oauthlib
- Flask-OAuthlib is an OAuth2 Client/Provider for Flask built upon oauthlib
- Authlib has an OAuth2 and OpenID Connect Provider, generic and Flask.
NodeJS
- NodeJS OAuth 2.0 Provider
- Mozilla Firefox Accounts. A full stack Identity Provider system developed to support Firefox Marketplace and other services
- OAuth2orize: toolkit to implement OAuth2 Authorization Servers
Ruby
- Rack::OAuth2 - OAuth 2.0 Server & Client Library in Ruby.
.NET
- .NET DotNetOpenAuth
- OAuthServer a simple OAuth server 2.0 developed in C# to provide OAuth authentication for Active Directory Users.
- IdentityServer 3
- IdentityServer 4
Erlang
- Erlang OAuth 2 Server framework
Go
- Fosite: Extensible security first OAuth 2.0 and OpenID Connect SDK for Go.
- osin: Golang OAuth2 server library
- Golang OAuth 2 Server framework
- gin-oauth2: middleware for Gin Framework users who also want to use OAuth2
Kotlin
- Kotlin OAuth2 server: Flexible OAuth2 server library
Elixir
- Elixir OAuth2 Server: The no-brainer library to use for adding OAuth 2.0 provider capabilities to your Elixir app.
Rust
- oxide-auth: A OAuth2 server library, for use in combination with iron or other frontends, featuring a set of configurable and pluggable backends.

Client Libraries

PHP
- league/oauth2-client: OAuth 2.0 Client from the League of Extraordinary Packages
- oauth-api from PHP Classes
- Very simple OAuth 2.0 client, PHP >= 5.4 (Composer: fkooman/oauth2-client)
- OAuth2/OpenID Connect Client Library for PHP/Zend Framework 2
Objective C
- Cocoa
- iPhone and iPad
- iOS and Mac OS X (draft 10)
- YToolkit
Swift
- OAuthSwift
- p2 OAuth2
Java
- Spring Social
- Spring Security OAuth
- Restlet Framework (draft 30)
- ScribeJava
- oauth2-essentials
- Light Java Client
- Google OAuth Java Client
Scala
- Silhouette
Python
- sanction
- rauth
- Authomatic
- Python Social Auth is an OAuth and OAuth2 client for a multitude of services.
- Flask-OAuthlib is an OAuth2 Client/Provider for Flask built upon oauthlib
- Authlib has built-in OAuth 2 client for Flask and Django.
Ruby
- Ruby Gem
- Ruby
- Rack::OAuth2 - OAuth 2.0 Server & Client Library in Ruby.
ColdFusion / CFML
- OAuth2 - OAuth 2.0 Client Library for ColdFusion. Contains simple components for specific resource servers.
Javascript
- Javascript
- OAuth2-client-js
- Salte Auth
Node.js
- Grant
- PassportJS
- OAuth2-client-js
Perl
- Perl OAuth2 Server on Catalyst
- Perl OAuth2 Server on Mojolicious
.NET
- OWIN Middleware
- DotNetOpenAuth
- DotNetAuth
- Spring Social for .NET
- Xamarin.Auth
Qt/C++
- O2 (supports OAuth 1.0a and 2.0)
- Qt Network Authentication (since 5.8, supports OAuth 1 and 2)
Lua/Corona SDK
- Corona/Lua OAuth 2.0 API
Dart
- Dart OAuth 2.0 Client
Go
- Go OAuth 2.0 Client
ActionScript
- ActionScript OAuth 2
PowerShell
- PowerShell client
Elm
- elm-oauth2.0
Elixir
- An Elixir OAuth 2.0 Client Library
Rust
- Extensible, strongly-typed Rust OAuth2 client library

OAuth Services

Auth0: Authorization Server as a service (or self hosted)
Curity Identity Server: A self hosted Authorization Server
Hydra an open source OAuth2 and OpenID Connect server for new and existing infrastructures
OAuth.io (self hosted), and also you can use as an external service
Okta
SSQ signon (self hosted), and also you can use as an external service
Glewlwyd (self hosted), lightweight OAuth2 server providing JSON Web Tokens, supports authentication with database or LDAP backend for users and clients.

Services that Support OAuth 2

Legacy OAuth 1.0 Support

See OAuth 1.0