Jitsi

Jitsi is a program designed to exchange text messages, as well as supporting calls and video communication. The project of this program was originally known as SIP Communicator and appeared in 2003. Initially it was a development of students, serving to demonstrate a prototype video phone based on JAIN-SIP (Java API for SIP protocol). However, this project was further developed with the commercial support of BlueJimp. The program's capabilities have been expanded and it has gained support for many other protocols.

The Jitsi client is written in Java and distributed freely under the GNU LGPL license. Supported application protocols include SIP, XMPP (Jabber, Google Talk, Facebook), AIM, ICQ, Yahoo! Messenger, MSN. It is worth noting that for some of them (for example, SIP and XMPP) there are functions of video calls and video conferencing, recording of conversations, streaming from the desktop and much more. In addition, data can be encrypted, which has a positive impact on security and privacy. The user interface of the program also leaves a pleasant impression, working with it is quite convenient and pleasant.