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.
NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar