Oct 29th, 2010 at 12 Noon EDT
SIP Communicator is an audio/video Internet phone and instant messenger that supports some of the most popular VoIP and instant messaging protocols such as SIP, Jabber, AIM/ICQ, MSN, Yahoo! Messenger, Bonjour, and a whole lot of other useful features. In the latest builds, SIP Communicator has g722 capability, making it a choice for use with VUC via ZipDX.
SIP Communicator has binaries built for Mac OS X, Windows and several linux distros, and the source is available on the SIP Communicator downloads page.