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BigBlueButton is an open source web conferencing system for distance education. BigBlueButton supports sharing of slides (PDF and PPT), video, whiteboard, chat, voice (using Freeswitch or Asterisk), and desktops. It's built using over fifteen open source components, runs on Mac, Unix, and PC ... [More]
Browser-based web conferencing software. - Presentation and document sharing - Audio and video sharing - Application sharing - White board and annotations - Chat - Polls - Question manager - Record and archive Both open-source and enterprise edition available.