FreeMeter - Monitor network bandwidth (C#.NET 2k/XP+). Desktop and Systray graph.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
Network Lights - Network Lights is a Windows program, which blinks keyboard LEDs (Light Emitting Diode) indicating outgoing and incoming network packets on network interface.
NetTraffic - Essential network bandwidth monitor.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
Network Activity Indicator - Network Activity Indicator displays the old 'two monitors' icon in Windows 7 that flashes blue to show network activity in the System Tray.