Up for grabs are:
Aura: Fate of The Ages, which I own on disc, and have actually played!
Deponia 1, which I got in the Daedalic Humble Bundle a while back.
I already own Dead Reefs on disk, but I don't see a way to gift that one :(
The Aura and Deponia games will be gifted via a Steam key, and may include a direct DRM-free download -- I'm not sure.
If you want either or both of the games, just post in this thread! If more than one person wants the same game(s), I'll roll a die to determine who gets what.