Best Free Disk Space Analyzer

Disk Space Analyzer is a useful freeware Windows 95/98/Me/NT/Vista/7/ utility that allows computer owners to analyze hard disk space.

JDiskReport

JDiskReport enables you to understand how much space the files and directories consume on your disk drives, and it helps you find obsolete files and folders.




WinDirStat

WinDirStat is a disk usage statistics viewer and cleanup tool for Microsoft Windows (all current variants).