ekiga: ekiga (GNOME Ekiga Voice Conferencing)
ekiga:
ekiga: Ekiga is an H.323 and SIP compatible videoconferencing and 
ekiga: VOIP/IP-Telephony application that allows you to make audio 
ekiga: and video calls to remote users with H.323 hardware or software 
ekiga: (such as Microsoft Netmeeting) and SIP compatible software. It 
ekiga: supports all modern videoconferencing features, such as 
ekiga: registering to an ILS directory, gatekeeper support, making 
ekiga: multi-user conference calls using an external MCU, using modern 
ekiga: Quicknet telephony cards, and making PC-To-Phone calls.
ekiga: