Congrats to the Jetbrains team for another great looking release. As always you can hit the What’s New page for all the new bits. A few highlights:
- SASS, Slim and Sinatra
- MongoDB and Mongoid
- Rails Engines
- (My favorite) “Renaming model magic” for more awesome refactoring
- Improved Mac support with native help and retina display support
Note that 4.5 is a free update for everyone who purchased their RubyMine license after July 18, 2011.