Well i just found some thing which attracts my interest so thought of sharing it with u all. Its an MicroEmulator which runs in applet, so u can run ur app in web browser, i think to provide demos to client or even to advertise ur app in ur web page its a great thing. Since the emulator is having all controls so before downloading ur app user can see its functionality. check it out on below link...
see it in details and u can download it form following link..