http://sourceforge.net/search/?type_of_search=soft&words=freemind
Another trip on sourceforge revealed that Freemind has a couple of wiki’s that support its format along with some tools to extend its functionality.
My favourites from the above search are:
LiveMind: AJAX MindMap editor – “this is an on-line, html (AJAX) based editor & browser for FreeMind (http://freemind.sourceforge.net/) mindmaps.”
Mapp.it – “A web-spider, based on the availability of URL APIs to most web based databases, mapping web pages to two dimensional FreeMind mind-maps. “