What is RubyMine 4.5 (Nire)?
For more information on RubyMine visit http://www.jetbrains.com/ruby.
Official released version of RubyMine RubyMine 4.5 is available for download and purchase from RubyMine website.
RubyMine Nire RC Downloads
Windows installer (includes bundled JRE 1.6.0_31)
Mac OS X installer
This Release Candidate build requires a valid RubyMine license. If you haven't used your evaluation of RubyMine, you can evaluate this version for free for 30 days.See the full list of RubyMine 4.5 changes
RubyMine EAP Release Notes