Aptana RadRails is an Integrated Development Environment for Ruby on Rails projects. Built on top of the well-known Eclipse platform, RadRails provides all the tools you need to create a whole Rails application from a single interface, allowing you to focus on the creative part of the development as your IDE takes care of the mechanics. Это и многое другое вы найдете в книге Aptana Radrails (Javier Ramrez)