Collaboro
Collaboro makes language development processes more participative: both developers and users of the language can collaborate together to create and evolve it.
Modelio Constellation
Constellation organizes and manages collaborative (distributed) World Wide Modeling projects,
Moka Extension for logging
Moka extensions provides a number of plugins that extend the functionality of Papyrus Moka engine for fUML simulation:
Papyrus extension for AOM
Papyrus extensions offer a number of plugins that extend the functionality of Papyrus UML for Aspect Oriented Modeling (AOM).