Modelio Constellation
Constellation organizes and manages collaborative (distributed) World Wide Modeling projects,
NeoEMF
NeoEMF is a project that aims at handling large EMF models in an efficient and scalable way.
PauWare
PauWare engine is a Java API, i.e., a set of Java classes and interfaces making up an execution engine for State Chart XML (SCXML) and UML State Machine Diagrams