Thanks for checking us out. We are busy working hard on a tool that will bring software development productivity to a whole new level. At some point this summer, we will release a full fledged model-driven development tool, with support for model execution and complete code generation.
Before that, as a preview, we plan to release one of its components as a standalone product. It is a UML authoring tool that presents a hybrid textual/graphical notation. Our hunch is that even hardcore hackers will want to use it.