Have(steam tradeable):

Half Life 2: Episode 1 ($1)
Day of Defeat: Source ($2)

Have(keys):

Superbrothers: Sword & Sworcery EP ($.50)
Crayon Physics Deluxe ($.50)
Lead and Gold ($.50)
Cortex Command ($.50)
HiB2 ($1.50)
Dungeons of Dredmor ($.50)
Gish ($.50)
Cogs ($.50)
Avadon: The Black Fortress ($.50)
Zen Bound 2 ($.50)

Buy and get free (while they last) :

Booster Trooper guest pass
Trine 2 75% off coupon