SIP-based software telephone with video and chat features

 QuteCom is a Voice-over-IP application based on standard protocols like SIP
 and RTP. It enables voice, video and text chat between two clients. Features
 include a contact list with multi-protocol presence and status, call history
 and NAT traversal capability.
 .
 QuteCom is the new name of the WengoPhone project, after it was dropped by
 Wengo and taken on by MBDsys.