WinDirStat is a disk usage statistics viewer and cleanup tool for Windows based systems.

SpaceSniffer is a freeWare and portable tool application that lets you understand how folders and files are structured on disks.

iStat is an advanced Mac system monitor for your menubar.

Scanner is a tool uses a sunburst chart to display the usage of your hard disk or other media.

WizTree gives you more control over how you see your files, in addition to letting you learn more about them from one look.

SequoiaView is a disk browsing tool based on the principle of treemaps.

RidNacs is a free and very fast disk space usage analyzer for Windows.

FreeCommander is a freeware file manager with built-in FTP client, archive handling, multi-rename, wipe files and MD5 checksums.

TreeSize Free is a free disk space manager for Windows. The software shows you the sizes of folders including all subfolders.

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.

SpaceMonger is a tool for keeping track of the free space on your computer.

Folder Size is a freeware disk size analysis tool that will display the directory sizes and folder tree sizes.

Yamicsoft Windows Manager helps you make your system perform faster, eliminate system fault, increase stability and security, and personalize your copy of Win…