BigBlueButton is a open source online conference system for online teaching. BigBlueButton allows you to share documents (PDF, any office document), webcams, chat, audio, and your desktop. And it is also capable of using tools on the uploaded documents like a pointer, zoom and drawing.
As a viewer the user can join in voice conference, share his webcam, raise hand and talk to others. As a moderator the user can mute/unmute others, remove users and make every other user be the presenter. The presenter can send slides and controle the presentation.
In HT2P you have a optimized hosting solution for this platform, given that the use of traffic must be higher for audio and video transmissions.
Get in touch with us and know more about this solution.