Freeware
Vista / Win7 / Win8 / WinXP
My System Monitor is a neat tool that docks at the top of the Windows desktop and displays information on your system.
It shows the hard disk drive and flash drive read / write activity and speed, the CPU usage stats, the memory usage stats and also your network Upload and Download speeds.
Screenshot
Download:
http://www.afterdawn.com/software/general/download_splash.cfm/my-system-monitor