https://munin-monitoring.org/

https://github.com/munin-monitoring/munin
https://github.com/munin-monitoring/munin/wiki/_pages

https://gallery.munin-monitoring.org/

http://guide.munin-monitoring.org/en/latest/

https://munin-monitoring.org/news/
https://munin-monitoring.org/download/

demo
http://demo.munin-monitoring.org/munin-monitoring.org/www.munin-monitoring.org/

plugins
https://github.com/alrs/muninplugin

https://github.com/huginn/huginn