Official Facebook SDK for iOS to access Facebook Platform Login feature

Instance ID provides a unique ID per instance of your iOS apps

The Google Toolbox for Mac OAuth 2 Controllers make it easy for Cocoa applications to sign in to services using OAuth 2

Amazon Cognito SDK for iOS

Firebase Auth enables apps to easily support multiple authentication options for their end users

A password manager and secure wallet for Mac, Windows, iOS, and Android

AFOAuth2Manager is an extension for AFNetworking that simplifies the process of authenticating against an OAuth 2 provid

The ADAL SDK for iOS and Mac OS X gives you the ability to add support for Work Accounts to your application with just a

Authentication via Linkedin

A simple, light-weight, and modular OAuth client library for the Java platform.