Performance Monitor is a program that shows you the CPU, Memory, Disk and Network utilization under Windows NT platforms (2000, XP+).

It's composed by four fully configurable small graphs and it can work in the tray area also.

The windows are fully anchorable and by moving the "CPU" window you'll move the other attached windows.

PerfMon can become transparent and permits you to forward left-mouse clicks so you can place it anywhere.