CRGE is the Conjectural Roleplaying Gamemaster Emulator. It was built with years of solo RPG experience, and is streamlined to keep the story going while also presenting some unexpected twists. CRGE can overlay any gamemaster run tabletop RPG, or it can be used as a standalone game system to create worlds and stories.
CRGE is expected in February/March 2015.
An independent playtest write-up can be found at Solo RPG Voyages.