The latest Humble Indie Bundle is all about the Double Fine.
Pay what you want, and get Costume Quest, Stacking, and Psychonauts for PC, Mac, and Linux as DRM-free downloads (and as a Steam key if you pay more than $1 USD)! Pay more than the average (currently just under $8 USD), and you'll also get Brütal Legend (also for Windows, Mac, and Linux DRM-free and with a Steam key).
If you have the money, you may also pay $70 or more, which will net you an exclusive Humble Double Fine Bundle T-shirt (available in black or cream).
Like all Humble Indie Bundles, a portion goes to charity (Child's Play and the Electronic Frontier Foundation), and there's a slider available which you can decide how much of your payment goes to which charity, how much goes to Double Fine, and how much goes to Humble Bundle. If you haven't picked up these games yet, want to get a Steam key for the games, want to support charity and/or Double Fine, or just want to get them again for whatever reason, the Humble Double Fine Bundle is for you.