I highly recommend Fink (http://fink.sourceforge.net/) and Xfree86(http://www.xfree86.org/)since some of the tools mentioned above require X11R6. Fink isthe easiest way to build the libraries that you will need.
I would also recommend the Oroboro window manager for use with Xfree86(http://oroborosx.sourceforge.net/).It gives you seamless integration with the Mac OS-X desktop.
For more generic Mac links, check out my MacLinks page! You might also be interested in some of my