KNemo - KNemo displays for every network interface an icon in the systray.
FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
DU Meter - DU Meter is a network bandwidth monitor for your computer.
Rainmeter - Rainmeter is a desktop customization platform.