These tutorials are built using Rails 3.

If you didn't know already, Refinery is a CMS that is built on the Ruby on Rails framework and Heroku is a service that allows you to host Ruby applications/websites that are built using Rails, Sinatra, or...

Alright, for those that don't know, engines (formally known as plugins) are a way to add functionality to your site. Engines create a tab in the backend that allow users that aren't tech savvy to enter information in a very user friendly way. Let's...