A website and search engine dedicated to helping people find the best deals on PC games.
http://isthereanydeal.com/
It searches Steam, GamersGate, GameStop PC, GameTap, GreenMan Gaming, GetGames, Desura, GoG, Beamdog, DotEmu, Amazon US, Adventure Shop, Nuuvem, IndieGala, and DLGamer.
Fair warning: I've had the site error out on me multiple times, so they may be having server issues at the moment.
Happy hunting!
http://isthereanydeal.com/
It searches Steam, GamersGate, GameStop PC, GameTap, GreenMan Gaming, GetGames, Desura, GoG, Beamdog, DotEmu, Amazon US, Adventure Shop, Nuuvem, IndieGala, and DLGamer.
Fair warning: I've had the site error out on me multiple times, so they may be having server issues at the moment.
Happy hunting!