[Legogris]

Btapp.js is just a JavaScript API that acts like an interface to their closed-source, Windows-and-OSX-only browser plugin Torque: https://github.com/bittorrenttorque/btapp/issues/11

Something that is done purely with cross-browser compatible web technologies is far more interesting and promising.

[rid]

Thanks for the clarification, additionally I could only find a Chrome plugin for Torque, which should be compatible with other torrent clients out of the box. However I can definitely see the advantage of using only web technologies. If anyone's interested I found the paddleover example on github:

https://github.com/bittorrenttorque/paddleover.com