Platyput Wiki is a free software project. We are just at the beginning of our path. If you want to join us feel free to contact us. We are looking for skilled Java developers interested in Semantic Web and Wiki Wiki Web; Ant, Tomcat, Web Application and Jena v2.x experience is welcome.
The project is hosted at SourceForge; for more information, see the summary page.
(If you are a native English speaker and want to give us a hand with documentation and contents... you are very, very, very welcome. ;-)