Hotline Miami, Proteus, Little Inferno, Awesomenauts, Capsized, Thomas Was Alone, and Dear Esther. That's what you get in the latest name-what-you-pay-and-donate-it-all-to-charity-if-you-want indie game bundle from the Humble Bundle folks. Oh, you also get the soundtracks for Thomas Was Alone, Capsized, Proteus, Dear Esther, and Awesomenauts. Full disclosure--I haven't played all of these games, but Thomas Was Alone is one of the best games I've played this year, Little Inferno evoked surprising emotions, Hotline Miami is ultra-violent brilliance, and anyone who likes exploration in games should probably play Dear Esther and Proteus.
All the games are available on Mac, Linux, and Windows, and you can get Steam keys for all the titles. The soundtracks are available in FLAC and MP3. To get all seven titles right now, you need to pay more than the average price, which is $5.68 at the time of this posting. I happily paid $25 for everything.