For three more days you can buy a bundle of 5 indie video games, and you can pay whatever you want. Furthermore, you can designate where your money goes, between the five game developers, EFF (the Electronic Frontier Foundation), and the Childs Play charity (video games for hospitals). Also, all of the games are cross platform; linux, mac, and windows.
The games are:
You can buy the bundle here: http://www.wolfire.com/humble