Runtime framework executes applications that are event-driven. LGPL

Xholon runtime framework 0.5 runtime framework executes applications that are event-driven or that have highly dynamic structure or behavior. You specify your models using XML and Java, or using third-party UML 2.0 tools and MDA transformations. It is based on the Real-Time Object-Oriented Modeling (ROOM) approach, UML 2.0 composite structure with ports, and finite state machines.