Apple Unix Server Penelope
   Provides a brief introduction to Apple Unix, and detail the procedure used to install A/UX 3.02 and Apache webserver 1.3.19 on a Quadra 800.
   http://www.aux-penelope.com/

OpenMac
   A site that refers to the multiple efforts at porting different flavors of UNIX to the Macintosh and Power Macintosh platforms, primarily representing the Linux for PowerPC and MacBSD projects.
   http://www.macbsd.com/openmac/index.html