Opinionated app strategy used for authentication & role-based authorization.

A rails authentication and authorization engine that reduces clutter in your controllers and views. Includes aliased link_to and button_to helpers that return an empty string if the current user is not permitted to follow the link. ...

Devise + Omniauth Authentication encapsulated in an Engine. Uses Devise. Parts taken from perens-instant-user and sso-devise-omniauth-provider

Authentication via JWT (with encryption)

Auth for your Rails application

Bushido support for Authlogic

Cloudfuji support for Authlogic

AuthNetReceiver is an endpoint and processor for Authorize.Net Silent Post transactions

Rails engine to add IndieAuth authentication endpoint functionality

A description of a really simple authorization plugin for Rails.

A gem for rails giving vast flexibility in authorization management.

Minimalistic authorization library for Ruby on Rails applications.

Authorization that includes basic authorization and 3 social authorization with Latvia social network draugiem.lv, facebook.com and twitter.com.

A JSON based Authorization.

A simple authentication provider for Ruby/Rails app. Designed for mobile clients and is compatible with the OAuth 2.0 specification.

AutoAdmin: an Admin UI that prefers hints over directions

remove before_action each controller

Auto assign model resource and collection from controller

Integrate with jQuery UI autocomplete library to provide select by autocomplete input and form helper.

AutoError is a mountable engine for Rails 4.0+ which provides an 'exceptions_app' which helps you catch exceptions (showing the appropriate page to users) and an interface you can mount in your admin panel to display those errors.