Slackware Linux (when I'm bored)
Ubuntu Linux (on a day to day basis, on my second computer)
Windows XP (On JoeMomma, on a day to day basis)
MacOS X (On my mommys computer, ^.^)
JoeOS (When I'm *really* bored)
Windows 3.11 (When I wanna play a game of MIG-29 on poptart, its rather addicting)
I voted other.