xmppc from network:messaging:xmpp project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:messaging:xmpp/openSUSE_Tumbleweed/network:messaging:xmpp.repo zypper refresh zypper install xmppc
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:messaging:xmpp/15.4/network:messaging:xmpp.repo zypper refresh zypper install xmppc