The collaborative framework Conzilla has primarily been developed to enhance the concept browser Conzilla (http://www.conzilla.org) with collaboration facilities. The Collaborilla framework is generic and can be used by other projects as well.
Peruser is a open-source lightweight knowledge application framework. Peruser speaks XML and RDF and is implemented in Java. Peruser code runs within Cocoon, as a standalone webapp, as console programs invoked through ant, or as embeddable java code.