Linphone is an open source SIP phone for voice/video calls, instant messaging and conference calling
License: GPL-3.0
Web page: https://linphone.org
Source code: https://gitlab.linphone.org/BC/public/linphone-desktop
Translate: https://weblate.linphone.org/projects/linphone/linphone-desktop-6-1/
Report the bug: https://gitlab.linphone.org/BC/public/linphone-desktop/-/work_items/new