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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.
openSpeak is a VoIP solution currently in development. It’s basically aimed at clan or casual gamers who like to chat with their friends/teammates while playing. There is currently support for Windows and Linux, other platforms might be added later on.
An initiative to create something similar to Windows programs like Roger Wilco, Teamspeak, BattleCom or Speak Freely, allowing users from different platforms talk with each other in real time with minimal CPU and bandwidth usage.
VoiceChatter is a free, open source, and cross platform voice chat application. It is built for gaming, so it is light weight, yet delivers excellent voice quality over minimal bandwidth and latency. For more, visit http://www.voicechatter.org