Another Humble Bundle, but the first to be available for Android devices! (Along with the usual Mac, Linux, and PC)

Check it out here!
http://www.humblebundle.com/

Minimum pay is $0.01, but you need to pay at least $1 to get the Steam keys. If you beat the minimum, you get World of Goo! (Which is a great game if you were wondering). Or course, it's good to be generous for this type of thing

I tend to put most of what I pay to charity (Child's Play, but last time, also the Red Cross)