Collaboro

Collaboro makes language development processes more participative: both developers and users of the language can collaborate together to create and evolve it.

Modelio

The open source modeling environment.

Moka Extensions

Moka extensions provides a number of plugins that extend the functionality of Papyrus Moka engine for fUML simulation:

Papyrus extensions

 

Papyrus extensions offer a number of plugins that extend the functionality of Papyrus UML for Aspect Oriented Modeling (AOM). 

S3D

Single-source design approach based on UML - MARTE