BigBlueButton is an open source web conferencing system for on-line learning. BigBlueButton enables you share documents (PDF and any office document), webcams, chat, audio, and your desktop. It can also record sessions for later playback.
Record and Playback
BigBlueButton can record your lectures for later playback by students.
Whiteboard controls let you annotate and call out key parts of your presentation for viewers.
Go beyond slides. The presenter can broadcast their desktop for all students to see. Works on Mac, Unix, and PC.
BigBlueButton voice conferencing supports voice over IP (VOIP) conferencing out-of-the-box. All your students need are speakers and a microphone to participate.
The presenter can upload any PDF presentation or office document. Keeping everyone in sync with their current page, zoom, pan, and the presenter’s mouse pointer.
Multiple users can share their webcam at the same time. There is no built-in limit on the number of simultaneously active webcams.