Devise extension to allow authentication via Stormpath

PKCS #12 authentication for Devise.

Time Based OTP/rfc6238 compatible authentication for Devise with Devise 4.2 and Rails 5 compatibility. Drop-in replacement for devise-otp.

Devise PostgreSQL authentication module

Devise extension to allow authentication to multiple LDAP servers, or with multiple configurations to the same LDAP server. Fork of the devise_ldap_authenticatable project.

add OAuth2 authentication to rails3 application

Devise extension to allow authentication using JWT

Flexible authentication solution for Rails with Warden, translated in FR by Ennder

Devise extension to allow authentication via iChain

Webmoney authentication module for Devise using Rack::Webmoney

Authentication for all Rails Api applications

Devise extension to allow authentication via LDAP, No ORM

Rails 4 engine that adds OAuth2 Provider support to any application built with Devise authentication

A Rack app/middleware to act as a proxy for OpenID authentication

Extension to devise to allow authentication with Archangel

Healthier provides comprehensive health check endpoints (live, ready, ping) for Rails applications with support for monitoring multiple backing services including PostgreSQL, MongoDB, Redis, RabbitMQ, Sidekiq, and ElasticSearch. It includes built-in authentication and flexible configuration options.

Additions to the googleauth gem for unsupported authentication schemes.

Simple admin function for Rails authentication.

Simple JWT based authentication

Researchable's JwtAuthenticable relies on Json Web Tokens to deal with authentication.