Munin vs Checkmk: What are the differences?
Developers describe Munin as "PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance". Munin is a 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. On the other hand, Checkmk is detailed as "A tool for Infrastructure & Application Monitoring". It is a software developed for IT Infrastructure monitoring. It is used for the monitoring of servers, applications, networks, cloud infrastructures, containers, storage, databases and environment sensors.
Munin and Checkmk can be primarily classified as "Monitoring" tools.
Munin is an open source tool with 1.34K GitHub stars and 389 GitHub forks. Here's a link to Munin's open source repository on GitHub.