wmavgload | small NeXTStep-like system load average monitor | Mehr ...
wmavgload provides CPU load averages integrated over 5 (main window), 30 and 60 seconds. Also, it takes very little space (64x64 square). . There's nothing in the program that makes it *require* WindowMaker, i.e. it works great with other window managers. But if you are looking for seamless integration on your desktop, wmavgload may suit your needs.
