I haven't pitched since high school, but I used to throw:
Knuckler - Nasty. Got the sucker worked out to one full rotation from release to the plate. There'd be several innings where it'd be the only pitch I'd throw.
4-Seamer - Never had much speed, clocked 76 at my absolute fastest, but averaged around 65 with good control.
OK-Change - My resort when the knuckler wasn't knuckling (like when the wind was howling in)
Curve - Big, slow hook. I didn't really develop the pitch as I didn't start throwing it until my senior year and I really haven't pitched since.