MacHg
MacHg is a free open source OSX GUI for the revision control system Mercurial. This allows you in a nice graphical way to manage a collection of files, to add things to the collection, to save a snapshot of the collection, to restore the collection to an earlier state and in general to work with the files. In my humble opinion it's the best Mercurial client for OSX.
via jasonfharris.com
John sent me this. Even though my time on OSX is now coming to an end (eight business days until my laptop gets shipped; unspecified time on the workstation from Dell) this is a really, really cool looking project. Not just highly functional, but totally visually striking and information rich.

