JetBrains RubyMine - Ruby and Rails IDE with the full stack
of essential developer tools, all tightly integrated into a
convenient and smart environment for Ruby programming and
Web development with Ruby on Rails.
* Intelligent Editor: code completion, code snippets and
automatic refactorings
* Project Navigation: wide range of views and one-click
jumping between components
* Error-Free Coding: on-the-fly code analysis and type
inference
* Web Development with Ruby on Rails (including best-of-
breed HTML, CSS and JavaScript editing support)
* RSpec, Cucumber, Shoulda and Test::Unit coding assistance
and GUI-based test runner
* Ruby Debugger: full support for Rails applications
debugging and easy-to-use interface
* VCS Integrations: Git, Subversion, Perforce and CVS with
changelists and merge
* Open API and Plugin Development SDK, ensuring IDE
extensibility and flexibility