Venmon - Compact size system resources monitoring utility and multi-ping tool for Windows
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
Taskbar Meters - Incredibly simple meters that live in the Windows 7 task bar.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
TinyResMeter - TinyResMeter is a small tool that displays useful information about system resources in real time...
NetTraffic - Essential network bandwidth monitor.