A new project is on its way to join PolarSys. CHESS provides component-based engineering methodology and tool support for the development of high-integrity embedded systems (e.g. satellite on board system). It implements its own UML profile based on MARTE (Modeling and Analysis of Real-Time and Embedded Systems) and extends Papyrus.
If you are interested in this proposal, or want to participate, please post a message on the Eclipse Community Forum.