Refinery CMS, often shortened to Refinery, is a free and open-source content management system written in Ruby as a Ruby on Rails web application with jQuery used as the JavaScript library. Refinery CMS supports Rails 3.2 and Rails 4.2 and Rails 5.1. Refinery differs from similar products by targeting a non-technical end user and allowing the developer to create a flexible website rapidly by staying as close as possible to the conventions of the Ruby on Rails framework.