Wraps RoleModel up to make role based authorization really easy in Rails >= 3.2.

An authorization gem for Rails that allows you to have the complete control of your app.

An authentication and authorization system for Rails

Akamai-AuthToken is Akamai Authorization Token for Ruby 2.0+

A flexible authentication and authorization framework for Rack applications.

Users, Authorization and Authentication for Isomorfeus.

Another authorization gem

Contextual authorization for your Rails (3+) application

A simple and elegant solution to authorization suitable for most small and medium-sized projects.

Lightweight and framework-agnostic ruby authorization system.

Group access authorization control, based on controllers actions access permissions using ActionSentinel.

Sequel mixin for SimpleOAuth2 authorization

Lockdown is an authorization system for RubyOnRails (ver >= 2.1).

Controller level authorization

Checkin is an authorization gem for Ruby on Rails

A portable, pluggable authentication and authorization service.

PickyGuard is an opinionated authorization library.

Eagleplatform authorization center client module

Authorization solution with devise and crowd. Helps to generate model, view, controller for user and admin.

JWT-Based authentication and authorization with Zaikio.