FreeMeter is a system-tray utility that shows you lots of information about your computer.
It's attractive, informative, and best of all -- free.
It shows total and free space for all available hard drives, memory usage statistics, and real-time graphs that depict network traffic and disk transfer rates.
You can customize the display to show just the information you're interested in.
You have the option of placing icon meters in the system tray that depict CPU usage, memory information, and free space on individual hard drives.
You can also establish low free-space levels for each drive and have FreeMeter provide an audible warning when that level is reached.
You can even have FreeMeter break down your hard-disk usage into a treeview folder analysis.
A Professional version with network support features is also available.