What's on your master bus?

[mridlen]

No but seriously:

(a compressor)
I've been sticking to Molot lately.
(some plugins for mild color)
FerricTDS, TeslaPro, Other Variety of Sound plugins, etc.
(mastering plugin)
Ozone 4 - usually only the limiter, exciter, and EQ in most cases. I've been trending toward using the limiter only as a volume normalization and not sausaging my waveform, because honestly I think it sounds better when I don't have a sausaged waveform.

[SWallace]

T-Racks Brickwall Limiter (just to check any crazy errant peaks)
T-Tracks LinearPhase EQ (sometimes)
Waves Kramer Master Tape (sometimes)
Waves RS56 (once in a blue moon; use this on busses a lot)
NI Solid Bus Comp (sc signal has low end and mid eq'd out)
Ozone 5

[camsr]

TDR FEEDBACK COMPRESSOR (CROWD GOES WILD)
REACOMP (DONT FEAR THE REAPER)

[Phil999]

I leave the master bus most of the time empty. The "sound" is created in the tracks and sub-busses. Needless to say I'm not into dance music.