Rails-opener-Bundle is a project mainly written in Ruby, it's free.
TextMate bundle to open files from rails specific directories
== Rails opener bundle
This bundle works like a standard 'Go to File...' but separates rails specific directories.
=== Installation
To install the bundle you should do following steps:
cd ~/Library/Application Support/TextMate/Bundles/ git clone git://github.com/lunich/Rails-opener-Bundle.git