Zabbix - Track, record, alert and visualize performance and availability of IT resources
ManageEngine NetFlow Analyzer - Bandwidth management made easy - Get the best combination of network traffic analysis and control
SolarWinds NPM - Advanced network monitoring for on-premises, hybrid, and cloud. Download a FREE 30-day trial of SolarWinds Network Performance Monitor (NPM) today!
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.
Paessler - PRTG Network Monitor is a network monitoring and infrastructure management tool. It lets network administrators monitor devices such as access points, routers and switches. Read more about PRTG.
iperf - A TCP, UDP, and SCTP network bandwidth measurement tool