If you like games on the PC, remember the name: Humble Indie Bundle. Basically, they are bundles of indie games (games not made by big companies like Valve or BioWare), which are generally very good. The important thing about HIBs is that you can pay whatever you want. Yes, whatever you want, be it $999,999,999,999 or $0.01. However, you only get Steam keys if you pay more than one dollar (to stop people grinding steam keys), and there are often offers where if you pay more than the average, you get extra games.
There have been several spin-offs of the HIBs, including Indie Royale, Indie Gala, Little Big Bunch, etc. Sure, they’re all right, but the games just aren’t as GOOD as the HIB games. In one HIB, I got And Yet It Moves, BIT.TRIP RUNNER, Cogs, Cave Story+, Crayon Physics Deluxe, Gratuitous Space Battles, Shank, Nightsky, Hammerfight, Jamestown, and VVVVVV. All of which (apart from Hammerfight, in my opinion) are absolutely brilliant games, especially Super Meat Boy and Cave Story+.
You also get the soundtracks for almost all the games as MP3’s (and sometimes FLAC’s). Most of the games have reasonable soundtracks, but occasionally you get amazing ones like the Super Meat Boy soundtrack.
This thing will tell you about the current bundle. If there is not one running, I HIGHLY recommend you sign up.