The latest in the famous Humble Bundle series has just launched, and it's arguably the best to date. There are no real highlights as pretty much everything is or looks great, but here's a few: Cave Story+, Gratuitous Space Battles, Super Meat Boy, Shank, and BIT.TRIP RUNNER.
You probably know it already, but just in case, Humble Bundles go by the 'pay what you want' model, though if you pay above the average ($5.56 as of this writing), you'll grab two extra titles (GSB and CS+). Additionally, you can put as much of that as you want towards charity (this time it's the Red Cross and Child's Play).
Humble Bundle games are compatible with Linux and Mac, as well as PC.