You have five dollars, right?
I feel even more confident calling the Humble Indie Bundle 11 one of the group's best offerings to date now that Starseed Pilgrim, Fez, and Beatbuddy have been added. These are available to customers who pay more than the average user-determined price for the bundle.
In short, that's under five bucks for the three newcomers and Guacamelee! Gold Edition, Dust: An Elysian Tail, Giana Sisters: Twisted Dreams, The Swapper, Antichamber, and Monaco, plus their soundtracks. All games are PC/Mac/Linux excluding Giana Sisters, which is PC-only.
Starseed in particular is a great addition here. In my mind, it's one of those games that you can't be sure you'll enjoy until you try it for yourself, and I'm not always willing to risk paying full price.