Create a Rails app with authentication, authorization using Devise and CanCan

Lawkeeper - Simple authorization policies for Rack apps

The last authorization gem you'll ever need.

Add http authorization methods to Roda

Tools to provide user authorization and data scoping.

Simple ruby authorization library.

Abstract authorization solution for Rails.

Authorization component for warden

A simple, yet flexible approach to model-based authorization

Authorization control

Omniauth authorization for Delivery.com API

Simple Security for Padrino API for clients APIS and role authorization

Super simple role based authorization

Gem for backend authorization

Rack Middleware for RPX Authorization, this rack middleware will make even easier to interact with rpx now

Rack Middleware for OAuth Authorization

Rack middleware for simple question and answer authorization.

Rack Middleware for OAuth Authorization and Authentication via/twitter

Ruby on Rails authorization plugin

Simplified authorization rules for rails_admin fields