Fantendo is an enigma of a wiki/site/database. Its original purpose was for Nintendo games and Fanfic. But it slowly changed into a database for stories altogether. You can create original, crossover, whatever types of works on it. Fantendo has quite a few nice ones, though almost everything else sucks.
Had an Alternate Reality Game contest that flopped.
Feel free to visit Fantendo and make pages about the various works there.