IntelliJ IDEA features the support for Ruby and Ruby on Rails, the open source Ruby framework for productive Ruby on Rails application development.
See the Live Ruby demo
The Ruby plug-in (http://plugins.intellij.net/plugin/?id=1293) makes IntelliJ IDEA the smart Ruby and Ruby on Rails editor, ideal for the full cycle application development. It provides the assisted Ruby coding, with keyword completion, Ruby syntax highlighting and other productivity-aimed features, including on-the-fly code validation and error highlighting. Now you can use all the power of IntelliJ IDEA to develop various Ruby and Ruby on Rails applications (cms, wiki, forums, blogs, and other Web services).
Dedicated Ruby and Rails modules with Ruby SDK support
Dedicated Rails project view
Basic code completion for Ruby keywords
Automatic completion for Ruby statements
Ruby syntax highlighting with braces matching
Ruby code formatting and automatic code styling
On-the-fly error checking and code validation
Smart structure view for Ruby files
Quick Ruby documentation (RDoc) view and lookup
Dedicated run configuration for Ruby and Rails with support for scripts
Intention actions to automatically create Ruby access modifiers and Rails skeletons and actions
Support for Go to class, file and symbol for Ruby files
Quick access to Rails generators and Rake tasks through context menus