NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
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.
Bandwidth Manager - Bandwidth management, bandwidth limiting and traffic shaping software for Windows
NetTraffic - Essential network bandwidth monitor.