Korn-a few times
Staind
Audioslave
Deftones
Stone Sour
Creed- I know I know :wtf:
Sevendust
Guano Apes
Queens of the Stoneage
NIN
Kid Rock
30 Seconds to Mars
Seether

Umm, I think that's about it. Some other opening bands, but no names that I can recall.