brett's projects: PythonJS, Blender2Ogre, Rpythonic RPythonic 0.3.1 now integrates with the fantastic Emscripten project to allow conversion of RPython into Javascript. PyPy itself had an experimental backend for Javascript, but this was recently removed because no one was maintaining it. Emscripten is more useful in any case because it will allow for the translation of C libraries used within RPy
