Disk Redactor
Disk Redactor is WIPE utility, that prevent restoration of the old ( deleted ) files at your disks. All free space at your hard disk will be wiped from an old information. This is necessary because the delete function does not clear the space where deleted file is located and just mark the entry... Old information will be available until the other file will overwrite it ( will use the same space at the disk ). ... But actually all information about the file is presented at the disk and can be restored!
http://www.cezeo.com/downloads/disk-redactor.exe - 361Kb - Download - Screenshot

VisDir Free Disk Space Finder
This free user-friendly utility helps you visualize which programs on your hard drive are using too much disk space. It creates a navigable pie-chart visualization of the space utilization on your computer. This utility is a great helper for when you get one of those messages from windows... This program will help you determine which programs are using too much space. ... Works on windows 95/98/ME/NT/2000/XP. ... This software is freeware with no expiration, no disabled features, no spyware, no adware, and no gimmicks whatsoever.
http://www.sb-software.com/visdir/visdir14.exe - 708Kb - Download - Screenshot

Dispexplorer
Hard disk utility that helps you track disk space usage. It uses stylish and unique 3d graphics. Helps you understand where is lost most of disk space. It's unique disk utility that makes your file system more organized. You can zoom in / zoom out unique 3d pie chart that shows each folder as... More info on site. ... Free trial 20 days. ... You can right click and choose context menu. ... Change colors also. ... Gradient bar charts shows size ratio between file / folder and root folder.
http://www.digihumm.com/Files/Dispexplorer.zip - 838Kb - Download - Screenshot

Disk Space Recovery Wizard
With Disk Space Recovery Wizard you could reclaim up to 500MB of wasted space Disk Space Recovery Wizard is the No 1 Garbage and Junk File Cleaning utility. With it's advanced search and clean capability it can find over 71 types of junk files in less than a minute. ... Another important function is the Junk Cluster cleaner which can reclaim hundreds of Megabytes of valuable space from wasted clusters on your hard drives. ... It also includes a cookie cleaner and temp file-cleaning tool. ... With ability to control, which files are to be deleted, this is a very easy to use tool.
http://www.dmisoftware.com/diskwiz.exe - 2Mb - Download - Screenshot

FolderSizes
FolderSizes is a powerful, network-enabled disk space analysis utility which provides users and network administrators alike with deep insights into how their local and network drive space is being consumed. It employs an advanced, multi-threaded file system scanning engine that works against... FolderSizes can export its disk space analysis reports in a variety of formats, including HTML, XML, and more? ... Free 15 day trial period. ... all accessible via a command interface for scheduling and systems integration.
http://www.disk-space-manager.com/download-folder-sizes/fs-setup.exe - 4Mb - Download - Screenshot

ASIS Backup
We know what you think: "Another backup utility? I have seen too many of these already. You can't surprise me with another one. I've seen scheduled backups, remote backups, incremental backups and anything-else-backups. " Ok, but how about a bootable backup? ... What do you do when your hard disk crashes or your computer simply won't start? ... ASIS Backup calculates the space needed to backup your data and the number of disks required according to the media format selected (CD-R/RW and DVD-R/RW of all kinds).
http://www.softotec.com/downloads/asis220.zip - 5Mb - Download - Screenshot

Fretless Space Explorer
Do you want to see the size of each of the folders on your hard drive? Trying to clean up your hard drive, but you don't know where to begin? Or just wondering what happened to all that disk space you used to have? The Fretless Space Explorer is incredibly useful for managing and maintaining... This is incredibly useful when you're trying to clean up your hard drive, recover disk space, plan your backups, improve hard drive defragmentation, or just to understand how your disk space is being allocated.
http://www.fretlessconsulting.com/...loads/DirectoryExplorer/Setup.exe - 132Kb - Download - Screenshot

R-Drive Image
R-Drive Image 3. 0 is a potent utility providing disk image files creation for backup or duplication purposes. A disk image file contains the exact, byte-by-byte copy of a hard drive, partition or logical disk and can be created with various compression levels on the fly without stopping Windows... If you need to restore only certain files from a disk image, you can connect that image as a virtual disk and copy those files directly from the disk image using Windows Explorer or any other file utility.
http://www.drive-image.com/downloads/rdi_en_3x.exe - 11Mb - Download - Screenshot

Disk Recon
This utility combines all tools that you need to manage your hard disk space locally or on a network server. With its intuitive interface you can easily find all the information you need to make allocation decisions. Folder treeview with sizes, Duplicate filefinder, Folder monitor, File search...
http://www.blacksunsoftware.com/downloads/DiskReconSetup.exe - 2Mb - Download - Screenshot

Storage Triage - Professional
StorageTriage is a utility that will size and analyze the content of your directory space. It provides access to the gathered data via a powerful Tree View, Graphs and Reports. It has the ability to export to Excel, Graphic Files, XML and a Database. ... Storage Triage has a 'batch' mode that allows you to use it with any standard Windows scheduler to automate your disk management functions. ... It will also show you the largest and oldest files. ... One of Storage Triage's most powerful feature is its analysis capabilities - showing breakdowns by File size, attribute, dates, times,...
http://www.datatexcorp.com/html/downloads/StorageTriage.zip - 10Mb - Download - Screenshot