The newest Humble Bundle offering (The Freedom Bundle) is a little different from the usual structure, as the minimum tier is $30 and every bit of that goes to charity. Mind you, you do get an awful lot of games for that $30. About forty, I think. Plus a few e-books too.
In addition, Humble will be matching the donations all the way up to the $300,000 mark. I’ve been watching it move up in real time while writing this, and it’s currently approaching $100k. All of the money goes to the American Civil Liberties Union (ACLU), Medecins Sans Frontieres (MSF), and the International Rescue Committee (IRC, not Thunderbirds). You can, as usual, tailor your donation with sliders, so if you (for example) particularly want one of those to get more/all of the cash, you can.
I’m not going to list all of the games, because you can obviously just go and have a look yourselves. There are plenty of good ‘uns though. Invisible Inc, Day of the Tentacle Remastered, Stardew Valley, The Witness, The Stanley Parable and Guacamelee! (Super Turbo Championship Edition) to name a selection.
All games are redeemable on Steam (you get Steam keys, basically). Some of them (it doesn’t say which) are entirely DRM-free. The e-books are DRM free, and available in “PDF, ePUB, and MOBI formats”. This bundle runs for another week, and may get additional games as it progresses.