Libraries that use Ex Libris products, can integrate Rails application with PDS to provide single sign-on across systems.

NYU libraries SSO client.

authpilot

Auth Proxy App (supports user / pass, oauth2)

This is a simple reverse proxy for Rack. It is not meant for production systems (although it may work), as the webserver fronting your app is generally much better at this sort of thing.

Auth Redis User Connector.

AuthRocket client for Ruby.

Authorization library using namespaced strings. Great for OAuth 2.0 APIs.

Utilizando a gem 'auth-service-authenticator', você irá plugar o serviço de autenticação em sua aplicação, sem necessidade de criação de um serviço de login

Agnostic authorization integration for Trailblazer.

AuthStrategies is a Warden implementation for sinatra.

Simple gem to realize API actions authorization with different strategies.

Client provider library for the authentication token storage service

General Purpose OAuth Tool

Rodauth integration for Bridgetown

The implementation plan the user auth.

authy-form-helpers packaged for Rails assets pipeline

A simple and smart multi-protocol bot (currently supports IRC) which allows for easy extension by means of its plugin API.

AutoAdmin: an Admin UI that prefers hints over directions

Automatically annotate your Rails models whenever you run a db:migrate