Rosette, another Actor language

The project is apparently a little on the inactive side, but the code is available, and web searches do still turn up some info: eocl, wikipedia, et. al.

Rosette is a high performance interpreter for the Actor model which has been enhanced with object-oriented mechanisms for inheritance and reflection. With Rosette, the object-oriented programming model and the Actor concurrent execution model are combined to simplify the development of autonomous, distributed agents.