Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application. Developed by University of Strasbourg (France), plus many others.
License: Open Source
Coccinella is a collaborative text editor focused on real-time editing and lightweight functionality, while Jitsi is primarily a video conferencing tool that also supports audio and group meetings. While both are open-source and free, they cater to different user needs: Coccinella excels in text collaboration, and Jitsi shines in video communication.