Credo provides a mechanism for storing credentials for situations where more desirable mechanisms (i.e. OAuth) are unavailable.

Couldn't get two-legged OAuth working from existing Ruby libs, so this implements it "by-hand"

OAuth assertion flow patch for doorkeeper

This gem provides a mountable Rails engine that provides single sign on, directory access and further Zaikio platform connectivity.

Basic and WIP API wrapper for Frame.io. Uses OAuth2 and omniauth-frameio strategy gem.

Harvest strategy for OmniAuth

Gigya's gem is a lightweight library to connect for multiple social networks using Gigya's REST API. It allows read/write access REST API, as well as support for OAuth.

Adds login using google button to login screen

Linkedin OAuth1+2 client

Client library which connects to the Fibit API using OAuth2 protocol.

Suunto OAuth strategy for OmniAuth

ActionGmailer, oauth/gmail delivery method

Retrieves an access token from an OAuth2 provider using the supplied credentials.

Wrapper for OAuth2::Token to automatically refresh the expiry token when expired.

A gem for Autodesk 2-phase authentication service.

Asana API Wrapper accepting Oauth tokens

A local callback server for oAuth web-flow.

A gem that allows a Rails app to be an OAuth client of Clickfunnels.

Consumes the Facebook OAuth2 Graph Rest API

This is a Facebook OAuth library for Ruby.