LibreNMS is described as 'Autodiscovering PHP/MySQL based network monitoring system forked from Observium. LibreNMS aims to be easy to use, painless to deploy, and support monitoring of a wide range of devices. Observium's license changed to a modified QPL license in May 2012, and' and is a Network Monitor in the network & admin category. There are more than 25 alternatives to LibreNMS for a variety of platforms, including Linux, Windows, Web-based, Android and Self-Hosted apps. The best LibreNMS alternative is Zabbix, which is both free and Open Source. Other great apps like LibreNMS are Nagios, Paessler PRTG Network Monitor, Spiceworks and Domotz .
LibreNMS is a remake of Observium