GOnnect

GOnnect is a Linux desktop client for placing telephone calls and holding video conferences. It puts a calling interface on the workstation — dialling, answering, and handling a conversation in progress — and extends the same arrangement to multi-party video sessions, so voice calls and meetings are managed from one program rather than a browser tab alongside a separate handset.

It comes from GONICUS GmbH and is licensed GPL-2.0-or-later, which allows use, modification, and redistribution under version 2 of the GPL or any later version, a slightly wider choice than a version-locked license gives.

The listing covers Linux alone, so desks running other operating systems fall outside its reach. It also names no signalling protocols, exchange or conferencing servers, or codecs, and a telephony client of this kind normally depends on a particular back end and account setup; the project's documentation is the place to confirm what infrastructure is expected before planning a rollout.