Ruby interface to the eBay XML Trading API
Quickbooks + Ruby using the Quickbooks Online v2 Data Services REST API
A simple Ruby client for the Piwik API
A Ruby Rack-based gem for on-the-fly processing - suitable for image uploading in Rails, Sinatra and much more!
Fast, Nimble PDF Writer for Ruby
A Ruby on Rails 3.x plugin that embeds the Piwik tracking code into the application
Easy file attachment management for ActiveRecord