Venmon is a system resource monitoring and multi-ping tool for Windows. It can monitor system memory, processor, battery life, uptime, idle time, network traffic, and drives. It uses minimal processing power and memory usage while displaying real-time statistics. Venmon can run in portable mode, such as off a USB stick and does not require the installation of runtime modules such as .Net, Java, C++. Freeware with no bundled malware or advertisements.
NetSpeedMonitor - NetSpeedMonitor is a lightweight Network Monitoring Toolbar for your Windows Taskbar
TinyResMeter - TinyResMeter is a small tool that displays useful information about system resources in real time...
TrafficMonitor - TrafficMonitor is a network monitoring suspension window software in Windows.
RPi-Monitor - RPi-Monitor is a tool that provides all the connected system peripherals properties and current metrics.
Network Lights - Network Lights is a Windows program, which blinks keyboard LEDs (Light Emitting Diode) indicating outgoing and incoming network packets on network interface.
Taskbar Meters - Incredibly simple meters that live in the Windows 7 task bar.