I'll give a choice; you can donate a tiny sum of money to charity and get some indie games on the cheap at the same time, or you can donate a lot of money to charity and your reward shall be the knowledge that you've done good in the world... and you'll still get a bunch of indie games cheap. You can do either with the new installment of the Humble Indie Bundle.
This event lets you pay whatever you want for five great indie games, and all of the money is split between the developers and two charities. The games are Crayon Physics Deluxe, Cogs, VVVVV, And Yet it Moves, and Hammerfight. Everyone one of them is a great use of your money, and you can spend as little (Or as much) as you want on the bundle.
Aside from helping out some talented developers, you'll also bee donating to some nerd charities like Child's Play which was created by Gabe and Tycho of Penny Arcade, and the Electronic Frontier Foundation which addresses geek legal matters like defending free speech, privacy, innovation, and consumer rights. The money you donate can be divided up according to your desires between the charites, the developers and the organization behind the Humble Bundle.
all games are DRM Free, and available for Mac , PC and Linux. Make a donation and get your games at the Humble Bundle's website.