Whether its Steam, GOG, or Humble, everyone loves them some discounts. So if you are in on the inside track, why not let some others cash in on that?
Guess I'll start out with the creators of Trine, Frozenbyte, who have put out Huge Seal, a collection of Indie titles that gives you the option of selecting what games you want discount codes for. Anywhere from 40-85% off for some quality games. Feel free to check them out.