FinkCommander is a graphical user interface for the Fink software packaging system for Mac OS X. It provides an intuitive front-end to the Fink command-line tools for downloading and installing Unix software. The source code is available.
What's new in FinkCommander
Universal binary for 10.4, 10.5, 10.6 on 32- and 64-bit PowerPC and Intel (thanks, Madd_the_sane).