Is there a tool similar to Eclipse Based Visual SCXML Editor for constructing Harel State Tables? Currently the status in the project page is code unreleased. how do i install the plugin?
There is this tool, which appears to be under active development: http://code.google.com/p/scxmlgui/
For a commercial tool, MagicDraw supports drawing UML state machines, as well as graphically simulating them using their Cameo Simulation Toolkit and the Apache Commons SCXML project: https://www.nomagic.com/products/magicdraw