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.
This site gives details of The Ambisonics Association and its work. The Association was created in April 2008, with the general aim of promoting ambisonics. Its initial work is concentrated in the (fairly technical) areas of the creation and promotion of collective marks ('trademarks'), standards (e.g. for file formats) and other necessary infrastructure for ambisonics.
Cosm is an integrated collection of extensions to Max/MSP/Jitter to assist the construction of navigable, sonified, complex virtual worlds, and has been designed to facilitate use in CAVE-like environments.