The Interactive Fiction Fund is a patron-supported initiative run by Javy Gwaltney to commission new works of interactive fiction each month. Because of the amount of funding and the timeframe, these tend to be short, choice-based pieces. Patrons get access to each new piece as it is finished, and the author then has the option of arranging to sell it on otherwise. If you too would like access to these when they’re published, though, you can sign up to the Patreon.
So far, there have been five IFF works, one for each month from January to May of 2015.
Emily Short's Interactive Storytelling 