Green Man Gaming (GMG) has some pretty good deals up.
– Uplink = $3.99
– Grand Theft Auto IV: The Ballad of Gay Tony = $3.74 – This requires the base GTA4 game and it uses GFWL.
– Mount & Blade: With Fire & Sword = $2.49
– Mount & Blade: Warband = $4.99
– Beyond Divinity = $3.98
Note that only the M&B Collection appears to use Steamworks. The games sold individually are DRM free. I could be wrong though.