NetWorx - NetWorx is a simple and powerful tool that helps you objectively evaluate your bandwidth situation.
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.