RubyMine is JetBrains's Ruby and Rails IDE. With RubyMine, you can produce high-quality code more efficiently, thanks to first-class support for Ruby and Rails, JavaScript and CoffeeScript, ERB and HAML, CSS, Sass and Less, and more.
Review System Requirements
RubyMine: Quick Start Guide
RubyMine: Getting Help
RubyMine: Tutorials
Referenced from: JetBrains