Collection of cool tools used by Mobile hackers
A collection of cool tools used by Web hackers
Versatile PDF creation and manipulation for Ruby
Google Toolbox for Mac
Pagination library for Rails, Sinatra, Merb, DataMapper, and more
Database constraints made easy for ActiveRecord
EventMachine, fast, simple event-processing library for Ruby programs
An app to help jumpstart a new Rails 4 app
Authorization Gem for Ruby on Rails