- rails/rails 32,593 Ruby on Rails
- thoughtbot/factory_girl 4,921 A library for setting up Ruby objects as test data.
- activemerchant/active_merchant 3,404 Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user …
- mongodb/mongoid 3,403 Ruby ODM framework for MongoDB
- dchelimsky/rspec 1,806 Behaviour Driven Development framework for Ruby