I was a little surprised nobody had made a topic yet, Humble Indie Bundle 7 has been out for about a week now and has some great games.
Snapshot, Closure, The Binding of Issac + DLC, Indie Game: the movie and Shank 2 are available and if you beat the average you get Dungeon Defenders +DLC(and there's a lot of DLC), Cave Story+, Legend of Grimrock, The Basement Collection and Offspring Fling.
It's a pretty good bundle. I've been able to play a few of them games available. Closure is a pretty good game, what little I played of it was very fun. Legend of Grimrock was a good dungeon crawler which seems pretty hard since I died on easy mode after 15 minutes.
The real steal here is Dungeon Defenders. I bought this game back in June and it's already one of my most played PC games. It's a great tower defense and action RPG combination with a lot of content. Add the DLC and the game is enormous. With the DLC, The number of levels in the game doubles and you many more heroes. I highly recommend it.