Federated Wiki is an innovative, decentralized wiki
Created by the inventor of the Wiki, Ward Cunningham and his collaborators, Federated Wiki is quite unlike anything you might ever have seen. Unlike centralized wikis such as Wikipedia, Federated Wiki creates a seamless wiki experience from content provided by lots of people, each of whom run their own wiki server. This enables unparalleled, uninhibited decentralized collaboration.
As the code is available as open source, you can set up your own instance and start collaborating with Ward and others across the internet.
Go to the Federated Wiki listing.