Cheat Engine

[Maes]

http://humblebundle.com/ (Varies)
http://indiegala.com/ (Always changed, it was last up two months ago with different games, now changed.)
http://indieroyale.com/ (Depends on the holiday, there's three coming out on Christmas, New Years, and later on in January.)
http://www.littlebigbunch.com/ (Dec 14 - Jan 2nd)
http://www.gamemusicbundle.com/ (Over, it will be up later.)
http://indievania.com/ (Not pay what you want, nor a bundle, but it has a lot of options.)

Going to do a bit of searching in my English period off, cheers!