Top Alternatives to MindGems Folder Size

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

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

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

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

Baobab is a disk usage analyzer is a graphical disk usage analyzer for GNOME.

Q-Dir (the Quad Explorer) makes your files and folder easy to manage, as an installed or portable Windows program.

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.

DaisyDisk is a disk space analyzer for OS X.

GrandPerspective is open source software for Mac OS X used for disk space analysis.

ncdu (NCurses Disk Usage) is a disk utility for Unix systems.

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

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

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

DiskUsage provides a way to find files and directories on storage card which consumes a lot of space.

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

Bitser is free Windows software for managing archives and backups. It supports ZIP, 7Z, RAR, ISO, MSI, VHD, GZIP, BZIP2,TAR, LZMA, LZMA2,etc.

GdMap is a tool which allows visualizing disk space.

Filelight is a KDE graphical disk usage analyzer, part of the KDE Utils package.

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

Xinorbis is a powerful hard disk, folder and storage analyzer.