[app request?] GNU Jami / JAMS (messaging, audio, video and conference solution)

I am wondering why I haven’t found GNU Jami messenging and conferencing (developed by savoirfairelinux) even mentioned in the forum.
It has clients for all major platforms.

Even has an LDAP capable organizational client configuration management-server package, see: https://jami.biz/jams-user-guide
Looks like this is a solution that is precisely made for self-hosting.