Amnesia
Psychonauts
LIMBO
Superbrothers Sword & Sworcery
Bastion (Beat the average price)
Lone Survivor (Beat the average price)
Braid (Beat the average price)
Super Meat Boy (Beat the average price)
Many games include soundtracks. Pay $1 or more to get Steam keys.
http://www.humblebundle.com/
FAO Linux users
"Good news for Ubuntu users, you can now redeem your Linux games on the Ubuntu Software Center with a click! ubuntu.com"