Valve sent over a press release today to announce the news. Here’s what they have to offer:
ArtRage Studio Pro
Many of the launch titles will take advantage of popular Steamworks features, such as easy installation, automatic updating, and the ability to save your work to your personal Steam Cloud space so your files may travel with you.
GameMaker Studio, for example, features integration with Steam Workshop that allows GameMaker users to share their work via Steam.
You can browse through Steam’s software offerings — all 10% off during the launch — on their website.