The xslt2 script semAuth (semantic authoring) translates a freemind mindmap into an xhtml website and an RDF ontology
This is the best so far for producing formal text from Freemind. It's much better than the export to Open Office supported in Freemind. Using Freemind is very effective to start writing, but it takes huge effort to make the mind map produced by Freemind into formal linear text required to communicate with general audience. semauth helps a lot for the purpose.