A gem for talking to the pagerduty API
Free and open source Q&A software, written in Ruby, Rails, MongoMapper, and MongoDB.
A MongoMapper backend for Delayed::Job
iPhone tracking library for Mixpanel Analytics
A port of Ruby on Rails' ActiveResource to Objective-C (and specifically the iPhone)
Facebook SDK for iOS
Various Objective-C utilities originally pulled from the ObjectiveResource project, but now having a more utilitarian slant.
Open Library branch of WMD.
Ruby on Rails
A Ruby Object Mapper for Mongo
Flexible authentication solution for Rails with Warden.
OmniAuth is a flexible authentication system utilizing Rack middleware.
Validatable is a library for adding validations.
Beautiful math in all browsers
simple job queue system based on mongodb
An invitation strategy for Devise (http://github.com/plataformatec/devise)