Jitsi Meet is an open-source (Apache) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, secure and scalable video conferences. Jitsi Meet in action can be seen at here at the session #482 of the VoIP Users Conference.
The Jitsi Meet client runs in your browser, without installing anything else on your computer. You can try it out at https://meet.jit.si.
Jitsi Meet allows very efficient collaboration. Users can stream their desktop or only some windows. It also supports shared document editing with Etherpad.
Learn more here:
jitsi.org/meet
conferencingapp