Code

OAuth libraries are available in a variety of languages.

• ActionScript
• C
• ColdFusion
• Dart
• .NET
• Elixir
• Elm
• Erlang
• Go
• Java
• JavaScript
• Kotlin
• Lua
• Node.js
• Objective C
• Perl
• PHP
• PowerShell
• Python
• QT / C++
• Ruby
• Rust
• Scala
• Swift

OAuth Providers

Open Source

• a12n-server
• Casdoor
• Glewlwyd
• Keycloak
• OAuth.io
• ORY Hydra
• SimpleLogin
• SSQ signon
• ZITADEL

Commercial

• Auth0
• Curity Identity Server
• FusionAuth
• Okta
• PingId
• Red Hat Single Sign-On
• cidaas
• LoginRadius
• ForgeRock
• ZITADEL Cloud

Related Projects and Services

• Vouch Proxy - an nginx reverse proxy solution that adds OAuth/OpenID authentication
• Osso - SAML to OAuth bridge

Legacy OAuth 1.0 Support

• See OAuth 1.0