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
Jitsi is primarily a video conferencing tool that excels in features like screen sharing and end-to-end encryption, making it ideal for virtual meetings. In contrast, Pidgin is a multi-protocol instant messaging client focused on text communication and file transfer, making it best suited for users who need to chat across various platforms.