Disk Space Analyzers

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  TreeSize Free

  Free

  Quickly Scan Directory Sizes and Find Space Hogs.

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  ValiDrive

  Free

  Quickly spot-check any USB mass storage drive for fraudulent deliberately missing storage.

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  WizTree

  Free

  The FASTEST Disk Space Analyzer.

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  Folder Size Free

  Free

  A free disk space analyzer that will show folder sizes in Windows.

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  DiskBoss

  Free

  An automated file and data management solution.

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  RidNacs

  Free

  A free and very fast disk space usage analyzer for Windows.

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  WinDirStat

  Free

  A disk usage statistics viewer and cleanup tool.

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  TreeMapFs

  Free

  A powerful disk and file management utility.

   

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  TweakNow DiskAnalyzer

  Free

  Find Out What's Taking-up Space on Your Hard Drive.

• 
  Xinorbis

  Free

  A simple but powerful hard disk, folder and storage analyser.

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  1Tree

  Free

  Quickly See Drives/Folders/Files Size in 1 Tree View

• 
  Folder Size Explorer

  Free

  Simple and free Windows Explorer with folder sizes and more.

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  JDiskReport

  Free

  Enables you to understand how much space the files and directories consume on your disk drives.

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  MeinPlatz

  Free

  A disk space analysis tool that visualizes file and folder usage to help identify storage consumption.

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  SpaceSniffer

  Free

  Visualizes disk usage using an interactive treemap layout.