CRGE: Conjectural Roleplaying GM Emulator

From publisher blurb:

CRGE is a GM emulator that works on adding the unexpected to your imagination. CRGE is a tiered system to create a role-playing experience without a GM. At the base level the system works to answer "yes or no" questions while constantly pushing the game towards the unexpected. At the intermediate level, the system weaves story threads together to give each scene a focus in advancing a specific narrative. At the high level, CRGE provides frameworks to tell complete stories by yourself, with a group of friends, or even online.

Best of all CRGE is system and setting agnostic. It will overlay your favorite roleplaying games with ease.