CPUMon is a simple little gadget to monitor CPU performance from your desktop. It displays a real-time graph of CPU performance as well as current usage indicator. The display supports custom colors, alpha-blending, user defined update rates and more. Some of the features: transparency, alpha-blending, customizable colors, layout presets, form locking, constantly updated CPU speed for Mobile processors, plus Tray Icon mode and Statistics. CPUMon can also display Memory Usage and many other useful stuff about your computer.
NOTE: This is a portable version with no installer.