Garry's Mod
Team Fortress 2 (even though it's free, I still have copies from when it wasn't. I think it gets you the "proof of purchase hat? Not sure)
Left 4 Dead 2
DogFighter
Day of Defeat: Source
Recettear
Braid
Monday Night Combat (Though now there's Super Monday Night Combat, which is "free")
Castle Crashers
Terraria
E.Y.E. Divine Cybermancy
Humble Bundle unredeemed keys:
BIT.TRIP RUNNER
Blocks That Matter
Frozen Synapse with Multiplayer Key
Galaxy on Fire 2™ Full HD
Humble Frozen Synapse Bundle Desura Key
Humble Frozenbyte Bundle Desura Key
Humble Indie Bundle #2 Desura Key
Humble Indie Bundle #3 Desura Key
Humble Indie Bundle #3 Steam Key
Killing Floor
One Way Heroics
Serious Sam 3: BFE
SpaceChem
Batman™: Arkham Origins DLC
Total War: ROME II - Caesar in Gaul (DLC)
I want...
RPG Maker VX Ace, for a friend
I don't have TF2, CS:GO or DOTA 2 keys, but if you check my inventory you'll probably be able to see all the cards and stuff, if you're interested in that kind of thing instead
Steam Gifts:
Garry's Mod
Team Fortress 2 (even though it's free, I still have copies from when it wasn't. I think it gets you the "proof of purchase hat? Not sure)
Left 4 Dead 2
DogFighter
Day of Defeat: Source
Recettear
Braid
Monday Night Combat (Though now there's Super Monday Night Combat, which is "free")
Castle Crashers
Terraria
E.Y.E. Divine Cybermancy
Humble Bundle unredeemed keys:
BIT.TRIP RUNNER
Blocks That Matter
Frozen Synapse with Multiplayer Key
Galaxy on Fire 2™ Full HD
Humble Frozen Synapse Bundle Desura Key
Humble Frozenbyte Bundle Desura Key
Humble Indie Bundle #2 Desura Key
Humble Indie Bundle #3 Desura Key
Humble Indie Bundle #3 Steam Key
Killing Floor
One Way Heroics
Serious Sam 3: BFE
SpaceChem
Batman™: Arkham Origins DLC
Total War: ROME II - Caesar in Gaul (DLC)
RPG Maker VX Ace, for a friend
I don't have TF2, CS:GO or DOTA 2 keys, but if you check my inventory you'll probably be able to see all the cards and stuff, if you're interested in that kind of thing instead