Lately I've been interested in shared story settings with community contribution. I don't mean fanfiction, I mean settings that are specifically established as being communal, with a set of rules or guidelines or whatever.

I'm familiar with Xanadu and Metamor Keep (both TF-focused) but neither setting really clicks with me, and I'd love to find one that does. Transformation is a particular interest, but I'm open to other themes too.

Does anyone have recommendations to share?

Failing that, starting a new one could be an option.