Macintosh OS X 10.4 (Tiger) Virtual Desktop (Nostalgia - OS X Tiger was what came with my gen 1 PPC Mac Mini - the first computer I ever bought with my own money) (www.virtualdesktop.org)
http://www.virtualdesktop.org/complete/osx4/index.html
http://www.virtualdesktop.org/complete/osx4/index.html