The Authentication Gem for Progic ID

Kerberos authentication for AuthLogic

Authentication with OmniAuth, API integration

JWT-Based authentication and authorization with Zaikio.

Interacts with the ruby-jira gem to provide authentication of a login against a JIRA system.

If you like to use Devise, but wish it had an easy token authentication system that handles a user logging in from multiple devices, DeviseMultipleTokenAuth is for you.

Helps to integrate Duo Security's 2-factor authentication with Devise in a seamless way.

Rails3 engine that adds OAuth2 Provider support to any application built with Devise authentication

For authenticating against PAM (Pluggable Authentication Modules)

Authentication strategy for devise based on headers, passed by Oracle Access Manager.

Devise::Capturable is a gem that makes it possible to use the Janrain Engage user registration widget, while preserving your Devise authentication setup with your custom user model.

A Devise plugin for exposing multiple authentication providers via omniauth.

The DceLti engine simplifies integrating LTI authentication for Rails apps via the IMS::LTI gem.

Rails authentication by email and password with integrated dependencies to MadMimi. Also provides administrative user impersonation. Based on BlueLightSpecial

This gem allows you to share a central database and using authlogic stores and retrieves passwords

Simple authorization system for Rails applications. Allows you to develop applications with a mixed role based authorization and a context based authorization model. Does not supply authentication.

A wrapper for the Globo.com's authentication/authorization API

Gitkite is the Rails authentication engine for Google Identity Toolkit (gitkit). It provides all the endpoints and views necessary for gitkit.

A light weight Firebase access token validator whichutilizes HTTP caching to reduce network traffic whenvalidating against Google's X509 Certificates.

Simple authentication solution for any rails app.