Humble just added a special bundle to support Brandon Boyer's medical fees. This is $25 and includes all of these items:
Actual Sunlight
AirMech
Auralux
Bagfull of Wrong
BitTrip Beat Soundtrack
BitTrip Fate Soundtrack
BitTrip Runner Soundtrack
Blocks That Matter + Soundtrack
Castles in the Sky + Soundtrack
Dynamite Jack
Ensnare Soundtrack
Ethan: Meteor Hunter
Fancy Skulls
God of Blades + Soundtrack
Goscurry + Soundtrack
Mazing
McPixel + Soundtrack
Paragon
POP: Methodology Experiment One + Soundtrack
Proteus
QbQbQb
Quixotica Soundtrack
Sepulchre Special Edition with eBook + Soundtrack
Shipwreck
Sokobond
Stacking + Soundtrack
Thomas Was Alone + Soundtrack
VVVVVV + Soundtrack
Waking Mars + Soundtrack
Warp Juggler
Wizorb + Soundtrack
World of Goo + Soundtrack
Some are Steam, some are DRM free. And there WILL be more games added soon. This is what their Twitter support account said:
1) Some games in the bundle are DRM free/Steam/Android/Soundtrack only, all donated by some very generous developers. (2/4)
2) The nature of this bundle doesn't allow us to enable Steam gifting. Share unclaimed bundle pages with others at your own risk. (3/4)
3) Purchasing this bundle also includes our endless love. Cancer sucks and we are glad you join us in the fight. (4/4)
So you can't gift games from the pack. This lasts until the 21st - If you want to buy it, I suggest waiting a bit for them to post a complete list of games and DRM included.
http://blog.humblebundle.com/post/79398200426/a-very-special-humble-bundle-of-love-for-brandon-boyer