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] computers, and is backed by an open source community that cares about good design and a streamlined user experience.
Webcam, Presentation, Integrated VoIP, Desktop Sharing
BigBlueButtonOnRails is web interface for BigBlueButton that will enable users of this system (Administrator, Moderators and Viewers) to perform certain tasks. Administrators will be able to manage this system giving moderators the rights to create scheduled meetings (taking place in BigBlueButton)
... [More] that they may customize to their satisfaction. The moderators will be able to invite viewers to these scheduled meetings or conferences which is perfect for online lectures or meetings.
Update - 24/11/09
A sample of our system can be viewed at http://bbbor.scottyhost.com [Less]