Telephony & A/V Conferencing

• Asterisk open-source PBX for Linux, from Mark Spencer and others
• Bayonne the GNU voice server/telephony project
• Call Commander "... a high-performance call screening and management system targeted for use in professional talk radio environments"
• Ekiga formerly GnomeMeeting), videoconferencing/VOIP telephony application that makes audio/video calls to users with H.323 hardware or software "(such as Microsoft Netmeeting)"
• FreePhone Internet telephony tool from INRIA
• Intercom "a simple voice over IP (VoIP) utility"
• JVOIPLIB Jori's Voice over IP Library is an object-oriented VoIP library written in C++
• KPhone "... is a SIP user agent for Linux, with which you can initiate VoIP connections over the Internet"
• Open Mash "...supports the Mash streaming media toolkit and...applications based on the Internet Mbone tools and protocols"
• Speak Freely Internet telephony for UNIX/Linux
• SUMOVER formerly the Robust Audio Tool, open-source streaming audio and conferencing software from UCL
• VOCP System neat Perl-based TAM/fax system, runs on top of vgetty
• Whisper modular software for handling local or remote data streams, includes a VoIP application
• Ztalk low-bandwidth voice communication over TCP/IP networks
• efone a distributed Internet telephone system
• erikyyyphone Internet audio conferencing application, uses very little bandwith and handles network lags intelligently
• linphone more VoIP for Linux, from Simon Morlat