I've burned a ton of workout mixes. Rob Zombie is a constant workout fave for me, as is The Offspring, NIN, Mudvayne, Disturbed, System of a Down, Rage Against the Machine, In Flames, Nevermore, Metallica, Exodus, Pitchshifter, Stabbing Westward, Linkin Park (I mostly just like their first album... and I know everyone says they're just corporate sellouts, but their stuff is so... catchy and high energy) and most metal and/or industrial bands. Here are some good work out songs:
Bullets & Octane - Pirates
Motorhead - Ace of Spades
Beautiful Creatures - Wasted
311 - Down
Mudvayne - Not Falling
Faster kittycat - Bathroom Wall
Jack Off Jill - Boygrinder
The Faint - Glass Dance
Lillian Axe - Body Double
In Flames - Pinball Map
Buckcherry - Broken Glass (though most of their songs are great for working out... they do have a few ballads but most of it is high energy rock)
Black Flag - Rise Above
The Distillers - Beat Your Heart Out (most Distillers stuff is good for working out, too)
The Misfits - American Psycho (Dig Up Her Bones is also good, as is most of the stuff from that album)
Reverend Horton Heat - Jimbo Song
Dropkick Murpheys - Never Alone
Sex Pistols - Problems (they also have a lot of good work out songs)
3 Doors Down - Smack
Janes Addiction - Just Because
Poison - The Scream or Sexual Thing (if you can find either - both are rare Poison tracks and both are amazing and high energy)
Dead Boys - Sonic Reducer
Hanoi Rocks - Delirious
Nashville P*ssy - Jack Shack
The Buzzc*cks - Jerk
MC5 - Call Me Animal
Alright, okay, I got really carried away