The Darwine project intends to port and develop WINE as well as other supporting tools that will allow Darwin and Mac OS X users to run Windows Applications, and to provide a Win32 API compatibility at application source code level.
GitX is a git GUI specifically for Mac OS X. It currently features a history viewer much like gitk and a commit GUI like git gui
iStat pro 3.0 is the next incarnation of the chart topping system monitoring widget
Excellent descriptions for useful triggers.
A list of the latest Quicksilver plugins available. This list is compiled from sources all over the web, and should have the most recent plugins that work with Mac OS X 10.5 and 10.6.
Tool to convert DRM songs from the itunes music store to unprotected mp3s. Uses only general purpose apple software.