Always Watching!
Watch any folder on a file system or available network for changes to file size, modification dates, file name or folder name, with customizable notifications.
http://www.liquidmirror.com/alwayswatching.asp

Stealth Folder Hide XP
Hide any folder on your PC. Stealth Hide Folder includes hide folder encryption.
http://www.folder-hider-stealth.com

Disk Recon
See how your disk space is being used throughout the folders, find files fast according to your criteria
http://www.blacksunsoftware.com/diskrecon.html

Sync Folder
The fastest way to compare and merge your files and folders
http://www.coolutils.com/SyncFolder

NeSoft: Change Folder Icons
Replace the standard icon of a folder with another icon from any type of resource file. Demo version available.
http://www.nesoft.org/change_folder_icons.shtml

Febooti Software
Febooti Software offers automated software solutions - Automation Workshop & Command line email, and other software tools & utilities.
http://www.febooti.com/

StorageTools
Format, Scan, Defrag for Pocket PC/Windows CE
http://www.softwinter.com/storagetools.html

FileWrangler
A Windows file manager which includes zip/unzip, multiple file list windows, file contents viewer, file patch maker, text and html editors, split files between disks, file encryption, and much more.
http://www.cursorarts.com/ca_fw.html

One Vision Software, Inc.
Offers storage management software, a digital storage network, file backup software, and online file storage.
http://www.1VisionSoftware.com

AB Commander
AB Commander: Powerful file manager for Windows Vista, XP, 2000. Free trial.
http://www.winability.com/abcommander/