Almost 10 years ago I wrote sttp http://info.iet.unipi.it/~luigi/sttp/ http://info.iet.unipi.it/~luigi/sttp/ plain javascript + markdown variation, allows rec

Almost 10 years ago I wrote sttp http://info.iet.unipi.it/~luigi/sttp/ http://info.iet.unipi.it/~luigi/sttp/ plain javascript + markdown variation, allows receivers to sync with the presenter using AJAX (that was the name, at the time ?) long polls. 20 years ago I extended Magicpoint to send (and receive) content and commands over RTP 30 years ago... I still used a overhead projector. I realize it's been 10 year since I last worked on the subject, and this days I use a mix of high tech and low tech solutions http://info.iet.unipi.it/~luigi/document-camera/ http://info.iet.unipi.it/~luigi/document-camera/