P4HL - a Perforce Half-Life mod. Must be seen to be believed.
P4QTree - a file integration graph for Perforce.
SQUID - an image differ.
CALAMARI - like SQUID but tastier!
Jamgraph - a Jam graph-drawing gizmo.
P4Saver - a very simple Perforce-themed screensaver.
Genesaver - a living, learning screensaver.
Scenesaver(the next evolution of Genesaver) - a unique twist on the "slideshow" screensaver.
SquareGarden - another screensaver.
SquareCraft - a fractal explorer sort of program.
WebThumb - a bare-bones thumbnail generator.
Perforce - the fast SCM system.