Munin is described as 'Networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work' and is a Network Monitor in the network & admin category. There are more than 50 alternatives to Munin for a variety of platforms, including Linux, Web-based, Windows, Self-Hosted and Mac apps. The best Munin alternative is Zabbix, which is both free and Open Source. Other great apps like Munin are Netdata, Nagios, Datadog and Beszel.