Protagonize is a creative writing community dedicated to the (nearly) lost art of the addventure, a type of collaborative interactive fiction. One author writes a story, and others post branches to it in different directions. The result is an organic, evolving story where everyone can participate.
Protagonize lets you explore your inner author: simply read and be amazed by the creative prowess of other writers, subscribe vi RSS, or contribute to stories yourself. Registered users can add page markers, keep track of your favourite authors, comment and rate stories. Sweet!
(vía EFL Geek)