
Arcadian Visions have released a plugin for Mac OS X's Spotlight that lets you quickly search your Ruby source code. Once indexed, you can search by module, class, method, general contents, or code comments. (Found via Have GNU, Will Travel)
(Added: Tread with caution! It seems one user is having problems installing this on their Intel x86 powered Mac. See comments.)

Comments
Pascal ·
Looked promising. Unfortunately, this may be too old to work on an intel based mac.
I'm getting this error:
2006-07-08 15:53:59.830 mdimport[2013] CFLog (22): Cannot find function pointer MetadataImporterPluginFactory for factory 45B6D607-388A-46B6-9E3B-B40CF7C752A7 in CFBundle/CFPlugIn 0x32b980 (bundle, not loaded)
Peter Cooper ·
It may even be a change to Spotlight APIs in 10.4.7 or something..
In any case, thanks for the report, and I've amended the post with a caution.