EjsS JavaScript programmers may be interested in the growing collection of JavaScript implementations of Physlet Physics resources. You can find these items by searching the OSP collection for "JS Model" or "Physlet Package." Here are links to the one- and two-dimensional kinematics packages:
I would have loved to have seen these working--just tried a few in my version of firefox, and they all seem to be scaled outside my window--must be a css thing. They are definitely neater than my ejss simulations, which all seem to fail as well.