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Asterisk is a complete PBX and telephony toolkit in software. It runs on Linux, *BSD, MacOSX, and Solaris. It provides all of the features you would expect from a PBX and more as it enables developers to build customized voice applications of many types. Asterisk does voice over IP in many ... [More]
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting.
Jitsi (previously SIP Communicator) is a cross-platform VOIP, videoconference, desktop sharing and chat client. Protocols supported include SIP, XMPP/Google Talk/Jabber/Facebook chat, AIM/ICQ, Windows Live, Yahoo! Messenger and Bonjour. Other features include: Call recording, Call & chat ... [More]
OpenWengo is a community project focussed on communication over IP, including VoIP, instant messaging and video phonecalls. Its main product is the Wengophone - a standards-based softphone and multi-protocol IM client. The successor of WengoPhone is QuteCom.
Yet Another Telephony Engine is a next-generation telephony engine; while currently focused on Voice over Internet Protocol (VoIP) and PSTN, its power lies in its ability to be easily extended. Voice, video, data and instant messaging can all be unified under Yate's flexible routing engine ... [More]
QuteCom is the new name for the open source softphone previously known as WengoPhone, a standards-based softphone and multi-protocol IM client. It is a community project focussed on communication over IP, including VoIP, instant messaging and video phonecalls.
pjsip is a professionally supported open source comprehensive multimedia communication library based on the SIP protocol. It is integrated with a rich media and a NAT traversal library supporting the ICE protocol. It is very portable and has a small footprint for embedded use.
Peers (aka SIP related experiments) is a java sip softphone. It's open source and gives the ability to register a sip account, place and receive calls on a standard computer. It requires sun java runtime environment version 6 (or later) or openjdk. Its graphical interface has been developed ... [More]