Make games, sculpt models, and paint with Steam's new software library.
It may be a month later than originally promised, but Valve is now offering non-game software for sale through Steam. Moreover, the whole available catalog is 10% off through Tuesday, October 9th.
The initial offering, though a little sparse, still contains a variety of productivity tools. In addition to the previously available Source Filmmaker, the library contains 3D-Coat, a voxel sculpting program, and ArtRage Studio Pro, a painting tool. A variety of free and paid versions of GameMaker Studio are available as well. Performance testing tools 3D Mark 11 and 3D Mark Vantage round out the catalog's personal- and organizational-oriented software, along with photo-organizer CameraBag 2.
Steam still has a long way to go before it can become a one-stop digital shop for any software you could need, but these new products look like a good first step.