Flexible authentication solution for Rails with Warden.

Easy file attachment management for ActiveRecord

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

OmniAuth is a flexible authentication system utilizing Rack middleware.

Authorization Gem for Ruby on Rails.

A Rails form builder plugin with semantically rich and accessible markup.

A simple ruby authentication solution.

A Really Ruby Mail Library

An Active Record Reputation System for Rails

Adds basic social networking capabilities to your existing application, including users, blogs, photos, clippings, favorites, and more.

Standard authentication stack for Rails using Twitter to log in.

Inkwell provides simple way to add social networking features like comments, reblogs, favorites, following/followers, communities, categories and timelines to your Ruby on Rails application.

Facebook Open Graph API in Ruby

A customized fork of thoughtbot's suspenders