On
www.humblebundle.com you can buy 5 indie games for whatever you want to pay for it (1$ minimum I believe). The procees are divided between developers and charity the way you decide yourself. If yoy pay more than $7.71 you get the first bundle (6 other games) as well, making it 11 games in total.
All games are DRM free and can be played on Windows, Mac and Linux.
Notable games in the bundles
World of Goo - I have this on my Wii. Really fun game
Braid - Don't own it (not really into platformers
) but it scores an 8 on metacritic, and I read some good reviews on it.
Machinarium - Same as braid, dunno it, good reviews though.
Bundle 2
Braid
Cortex Command
MAchinarium
Osmos
Revenge of the Titans
Bundle 1 (pay over 7.71$ to get this as well)
World of Goo
Aquaria
Gish
Lugaru HD
Penumbra Overture
Samorost 2