There is a list of 3rd Party Integration here https://docs.librenms.org/
Some of my favs:
Oxidized - for configuration backup & diffs https://docs.librenms.org/Extensions/Oxidized/
Weathermap - for network visualization https://docs.librenms.org/Extensions/Weathermap/
Weathermap Histogram - to create an animated network flows
Graylog - Centralized logging https://docs.librenms.org/Extensions/Graylog/
At some point i need to check out;
eNMS - network automation using librenms inventory eNMS has Integration with LIBRENMS!
@PipoCanaja interface admin plugin https://github.com/PipoCanaja/InterfaceAdminPlugin
You have lots of alert transport integrations too by default https://docs.librenms.org/Alerting/Transports/
and nagios plugins https://docs.librenms.org/Extensions/Services/