cvsFinder is an attempt to integreate CVS into the Mac OS filemanager, Finder. The end goal is to provide all the features of command line CVS through integration with the filemanager. Most of the work will be done in Cocoa and Objective-C.
FARCVS is a plugin to the FAR filemanager (http://farmanager.com), a Norton Commanger clone. Provides a UI for working with CVS: checkin and checkout, diffing and merging files, viewing statuses, etc... Written in C# using a .NET wrapper around FAR API.