What is new in this release:
RubyMine 7 comes with a new plugin that integrates Chef to help you build, deploy and manage your infrastructure.
What is new in version 6.3.3:
Version 6.3.3 brings support for Rails 4.1, better Slim and AngularJS, as well as multiple carets and selection.
Ruby 1.8 or higher, or JRuby