A conferencing system co-operative, set up primarily by refugees from TheWell, but using a similar set of software to mediate the discussion.
A disagreement over Bruce Katz's management of the WELL in 1994 or so led to the formation of the River as a "lifeboat" for those who disagreed with his firing of Maurice Weitman, as described in Katie Hafner's Wired magazine cover story from 1997, [The Epic Saga of the Well]
The spinning off of The River from the WELL serves as an example of the application of the RightToFork to the fissioning of online communities.