What are some alternatives?
netdata - Real-time performance monitoring, done right
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Icinga - Icinga is a fork of Nagios and is backward compatible.
Munin - PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance
Spiceworks Help Desk - Help desk software features that work for IT