Disk Recon 

This utility combines all tools that you need to manage your hard disk space locally or on a network server. With its intuitive interface you can easily find all the information you need to make allocation decisions.
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ExplorerXP 

ExplorerXP is a very fast, small, compact file manager for Windows 2000/XP. Unlike the regular Windows Explorer, it displays the total size of each folder and allows you to browse multiple folders from a tabbed interface.
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Disk Size Manager 

Disk Size Manager - a powerful hard disk space manager. Using Disk Size Manager you can keep track of your hard disks space to ensure its most efficient use. With its 2D/3D pie and bar charts as well as detailed descriptions in words.
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