PADRE
Performance-driven softwAre moDel Refactoring framEwork (PADRE)
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
VeriATL
Fine-Grained Incrementality for Deductive Verification of Model Transformations (Online)