Authorization for ruby apps using roles concept

Generators for adding simple authorization to nifty-autentication

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 OAuth Authorization and Authentication via/twitter

Ruby on Rails authorization plugin

Simplified authorization rules for rails_admin fields

Role based authorization security engine for your user model and resources.

Tools for handling per-action and per-app Role authorization

Authorization system that utilizes an extremely flexible hierarchy

Simple authorization solution

Bouncer brings simple authorization to Sinatra.

Matches resource requests with access managers and asks them to authorize

Generic implementation of a SOAR authorization policy

Even simpler authorization gem

Ruby Authorization Gem using Role Based Access Control

Social and password authorization solution