Ascendis DiskVision - Displays disk space utilization with detailed information. Supports easy management on individual files and folders. [Windows 95/98/NT4/2000]
BAC WhatsGone - Does a scan of the selected disc or folder and then gives a color coded view of the disc space used by each folder. Includes CSV export option. [Windows 9x/2000/ME/XP]
BytesBak - Maintains a history of disk space usage, allowing easier identification of disk contents that have been updated, grown or shrunk in size.
3D FileSystem Profiler - Provides 3D visual representation of file system statistics. Aids in visual analysis of the disk space usage. [Java based]
Directory Sizer - FranzO Software - Historical analysis of disk usage by directory. Charting and drill down with web UI. Designed for the enterprise with NT Services and remote install.
Dirlot - free folder size visualization utility - Shows relative size of files and subfolders in a folder on disk using interactively explorable and colorful diagram report. [Windows 98/ME/2000/XP]
Diruse - Command-line tool that displays directory size information, including compression information for NTFS volumes. [Windows 2000 with NTFS volumes]
Disk Recon - File management tool that includes folder sizes, file search, duplicate file finder and file monitor. [Windows 98/ME/2000/XP]
Disk Size Manager - Provides pie and bar charts of disk usage in a file manager interface. Includes a tool to conditionally search files and folders. [Windows 9x/2000/NT/ME/XP]
Disk Triage - Disk space sizing and analysis utility. Features visual graphs of the sizing data, with the ability to run in batch mode.
Disk Usage Explorer - A program to visually show the disk space distribution
Diskdata - Explorer-like application that displays disk space utilization in report or chart format. [Windows 9x/NT/2000/ME/XP]
DiskSpaceChart - A small shareware utility that shows a 3D pie chart indicating disk space usage. [Windows 9x/ME/NT/2000]
DiskSurveyor - Graphically maps hard drive space, catalogs files on CDs. [Mac OS 7 and higher]
DiskView - Integrates with Windows Explorer to present visual indication of disk usage. Provides a visualizer pane for pie/bar charts, adds folder size columns in the details view, and size indicator bars in Explorer's tree view. [Windows 2000/XP/2003]
Drive x-Ray - Drive x-Ray is a visual tool for finding and freeing disk space.
Filelight - Filelight is an open software that shows your filesystem as a set of concentric pie-charts. [Unix]
FolderSizes - Shareware that creates visual representations of hard drive space utilization and folder sizes through multi-threaded analysis engine. [Windows 95/98/ME/NT 4.0/2000/XP and Internet Explorer]
jDiskReport - Cross platform graphical disk report utility to analyze hard disks and collect statistics that can be viewed using charts and tables. [Free: Windows/Solaris/Linux]
Junkfind - Cross platform tool that helps graphically find and remove folders that take up excessive space. Uses rectangular boxes to represent folders based on their relative size.
OmniDiskSweeper - A utility for finding and deleting big, useless files to free up space on your hard disks. [Mac OS X]
O&O DiskStat - Displays disk usage as rendered 3D bar, doughnut, and treemap charts, optionally grouped by file type or owner. [Windows 2000, XP, 2003, Vista]
Power Admin WatchDisk - Tool with command line support for keeping track of disk usage on a network. Provides graphical reports of disk usage, automated alerts and data export options.
Rakersoft SpaceTrack - Disk utility that tracks, monitors and records disk space usage on a continual basis. Product specifications, screenshots, and downloads. [Windows]
ShowSize - ShowSize lets you see folder sizes, unused files, and also lets you print folder contents. [Windows 98/Me/2000/XP]
SizeExplorer - Explorer style software that shows the actual space used by a folder. Shows graphical charts of file statistics [Windows 9x/ME/NT/2000]
SizeWatch - Dynamically keeps an eye on the sizes of selected subdirectories. [Windows 9x/NT]
Space - Disk usage analysis tool for Windows. Shows graphically how disk space is being used. Works on local and network drives, and FTP accounts.
SpaceMonger - Displays files and folders as boxes, with sizes relative to space taken on disk. [Windows 9x/NT/2000/ME/XP]
SpaceObServer - Hard disk space manager for Windows. Scans directory trees and stores the collected data in an SQL database. A user interface reports space usage, growth and more in tabular views, 3D bar, pie and line chars. Integrated file search.
SpaceSearcher - Analyzes space usage on drives or network share drives. Detailed reports and 3D bar charts of hard drives can be viewed, printed, and exported to Excel or HTML.
TreePie - Program to graphically display information about distribution of size in a tree directory.
TreeSize Professional - Hardisk space manager for Windows 95/98/NT. Shows folder or drive size, wasted space, 3D bar and pie charts, last access date, searches for old, big files. Explorer-like interface, Excel or text export, context menu support. English or German shareware from Jam Software.