CHESS
CHESS implements the CHESS UML/SysML profile, a specialization of the Modeling and Analysis of Real-Time and Embedded Systems (MARTE) profile
Collaboro
Collaboro makes language development processes more participative: both developers and users of the language can collaborate together to create and evolve it.
EMF Views
EMF Views is an Eclipse plugin that brings the concept of database views to the modeling world
JTL
JTL is an EMF-based tool that allows you to design and manipulate models, maintain consistency and synchronize software artifacts, keep traceability during design.
Modelio Constellation
Constellation organizes and manages collaborative (distributed) World Wide Modeling projects,
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