FreeMeter

  FreeMeter is a Windows utility that helps you keep track of your system's resources, by monitoring, in real time, disk space usage, CPU usage, memory usage and disk transfer rates. FreeMeter can be used for just observing your computer's activity or for diagnosing technical problems. You can customize the display to show just the information you're interested in. You can also place icons in the system tray that depict CPU usage, memory information, and free space on individual drives. You can establish low free-space levels for each drive and have FreeMeter alert you when that level is reached. FreeMeter can also break down your hard-disk usage into a treeview for individual folder analysis.