Jitsi is a free and open source VoIP, videoconferencing and instant messaging application for Windows, Linux and Mac OS X.
Jitsi is an audio/video Internet phone and instant messenger written in Java. It supports some of the most popular instant messaging and telephony protocols such as SIP, Jabber/XMPP (and hence Facebook and Google Talk), AIM, ICQ, MSN, Yahoo! Messenger.
The development of Jitsi started at the University of Strasbourg (France) in 2003 by Emil Ivov. Originally the project was known as SIP Communicator. Throughout the years our community has grown to include members and contributors from Brazil, Bulgaria, Cameroon, China, Estonia, France, Germany, India, Japan, Romania, Spain, Switzerland, UK, USA, and others. In 2011 it has been renamed to Jitsi.
Jitsi is based on the OSGi architecture using the Felix implementation from Apache. This makes it very extensible and particularly developer friendly.
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