A free (libre), open-source (GNU LGPL) web-conferencing system developed with support from the Mozilla Foundation's WebFWD project. Designed for online education, BigBluebutton provides voice- and video-conferencing capabilities that include conference recording, presentation uploads, virtual whiteboard, and simultaneous webcam users.
The BigBlueButton server runs on Linux, but virtual machine images are available for running the server on other platforms.
Jahshaka is a video and film compositing, editing and special fx system that uses OpenGL & OpenML hardware rendering to give operators real time interactivity. The system is cross platform, and also includes full CG, paint and image processing modules.
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and als
In short, camsource grabs images from a video4linux device and makes them available to various plugins for processing or handling. It features a modularized and multithreaded design to offer a large amount of flexibility. A server plugin runs in its own thread, which makes it possible to use the same grabbed frame for several purposes at the same time. There are also filter plugins, which can be daisychained to create useful and no-so-useful effects in images. The configuration happens through an xml config file, hopefully making configuring camsource an easy task.