The online game retailer said that it will expand to carry non-game software starting September 5.
No programmes have been named for the September launch on Steam, with Valve only saying that titles will "range from creativity to productivity".
Speculation about Steam carrying non-game software began last month when ten additional software categories were discovered in the Steam mobile app. Categories included photo editing, accounting, design & illustration, and animation & modelling.
Software available through Steam will be able to use Steamworks features, including automatic updates and Steam cloud support for saving files.
"The 40 million gamers frequenting Steam are interested in more than playing games," Valve's Mark Richardson said.
"They have told us they would like to have more of their software on Steam, so this expansion is in response to those customer requests."
Developers interested in getting their software on Steam will also be able to participate in Steam Greenlight when it launches, enabling the Steam community to vote on games and software for the service to carry.