Mumble is low-latency, high quality voice chat
software primarily intended for use while gaming.
It should compile and run the client out of the
box on at least Ubuntu 6.06, and quite likely
other distributions as well.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Murmur has been optimized. Ice has been updated and documented. You can now use images in the server welcome text and text messages, using regular HTML tags. There are new server features. The Windows installer is now fully localized. There is improved positional audio, and more games are supported. You can now bind multiple shortcuts to every function. The overlay now works on OS X, but is considered experimental.