Yggdrasil is a member of a class of large-scale multiplayer looming projects, and it is one or a few soon-to-exist website(s) called Yggdrasil.

There should be a website where everyone is looming on a single tree, where you can branch anyone's text at any point, and there are lists of top branches and places to pin branches. Like websim but text only and with more emphasis on navigating the tree... Andy will make the tree of life a reality.