Zabbix - Track, record, alert and visualize performance and availability of IT resources
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Wonder Shaper - A bandwidth limiting and traffic prioritization tool for linux.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
LinkedIn Learning - Online training through LinkedIn's professional network.