FMS

The most popular forum system on Freenet.

It's not part of the official Freenet codebase because it is written in C++ (which is harder to secure than Java and cannot easily be embedded in the Freenet web interface), and because there has been no official review of its code.

It can be obtained through the FMS freesite

See also

The Unofficial Guide to FMS (You need Freenet for this link)

Contact information of its anonymous developer

jfms - Java implementation of the FMS