TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
DU Meter - DU Meter is a network bandwidth monitor for your computer.
NetTraffic - Essential network bandwidth monitor.