Humble Bundle - Buy a bundle of games, you decide the price, and support charity in the process.
Game Center - Game Center brings social gaming to OS X and iOS apps.
The Indie Gala - Buy a bundle of games, you decide the price, and support charity in the process.
GameStreamer - Connection people and games anywhere.
Fanatical - Buy awesome games. Pay a fraction of the retail price!
OpenGameArt.org - A site dedicated to sharing artwork & other assets for game development.