http://www.indiegala.com/
Pay what you want for these games (tier 1):
- Creatures: The Albian Years
- Pirates of Black Cove (Steam)
- Survivor Squad (Desura)
Pay over a certain amount for tier 2 (and tier 1):
- Chester (Desura)
- Sword of the Stars: Complete Collection (Steam)
- Vessel + Original Concept Art (Steam)
- Aquanox (Steam)
- Painkiller: Overdose (Steam)
And finally if you pay over a certain amount you can obtain tier 3 (as well everything else):
- Star Ruler (Steam)
- Edna & Harvey: Harvey's New Eyes (Steam)
- A New Beginning Final Cut (Steam)
- Sword of the Stars II: Enhanced Edition (Steam)
- Aquanox 2: Revelation (Steam)
- Crusader Keys Complete (Steam)
If I remember correctly, this site will only give you keys, not actual game downloads like humble bundle. You might be required to have steam or desura to play certain games.