Jitsi.meet

Intro

meet.jit.si is a webservice based on WebRTC, which is a standard for realtime communication in a browser. this standard is supported by all main browsers, just the mobile version of safari doesnt support it till now. but apple already announced the support of WebRTC in safari in the next version.
Its for fee and there is no limit of participants. it supports: screensharing, audio, video, chat, streaming to youtube, shared notes, sharing a youtube-video, raise hands, ...