Humble Bundle V added a few more games if you pay above the average (which you should or you are a bad person).
Braid - Cool as hell puzzle platformer. The main gimmicks are time control and non linear timelines. The art style is detailed and bright and some people like the story (I think it's pretentious, but I'm a hater of all things). It's worth playing just for the puzzles.
Lone Survivor - It's a really good horror/adventure game with a lot of inspiration from the Silent Hill series. The sound design is what I think this game does best. A lot of the noise in this game is really good at making you feel uncomfortable and in danger. The graphics are also pretty cool looking, being dark pixel art with lots of filtering. Downsides in my opinion are the shitty combat (which you should really try to avoid anyway) and the map opening up by itself every 30 seconds.
Super Meat Boy - Fucking owns.
Soooo yeah, this is the best humble bundle. BUY IT RIGHT NOW BECAUSE I TOLD YOU TO IN ALL-CAPS SO I MUST BE RIGHT.