Direct Folders
Access most recent and favorite folders directly from the standard File Open and File Save dialog boxes, as well as Explorer, WinZip and WinRAR. Can also automatically resize file dialogs, switch to the details view and set keyboard focus to the file list.
http://www.codesector.com/directfolders.asp

Advanced Hide Folders
Advanced Hide Folders, Email Monitoring, Anti Spy Software, Hide Files and Protect Folders
http://www.softbe.com/

3dfm - 3D File Manager
Displays files and folders in an interactive, 3D display. Rotate, pan and zoom the view, change folders, compare file and folder sizes, quickly search for files, and view images. [Win98/ME/XP/2000]
http://www.boulderwall.com/

AdvexSoft - Advanced File Manager
Efficient disk space tracking with Disk Space Inspector, versatile file management with Advanced File Manager and thorough computer clean up with Fast System & Internet Washer. These tools from AdvexSoft are the intelligent solution to all your disk and file management needs. If you're looking for disk space tracking tools, file management software or a system washer, download our free 30-day evaluation versions.
http://www.advexsoft.com

QuickFolders
Program adds a list of favorite folders, a list of recently visited folders and opened or saved files into system menu of standard Open or Save File dialog. It also customizes Places Bar of standard and MS Office Open and Save File dialogs.
http://www.bytegems.com

Data Visible
Manufacture of Classification filing folders, color-code bonded labels and visible products. 1-800-368-3494
http://www.datavisible.com

XFilesDialog
XFilesDialog will improve the standard file dialogs (Open / Load / Save) with new features: a) it will automatically resize all that file dialogs b) it will be possible to have a history of recently-used files and folders.
http://www.xdesksoftware.com/xfilesdialog.html

Lovely Folders
Utility to replace icons for individual folders and to set info tips for folders.
http://www.lovelysoft.com/lovelyfolders/

File Pulverizer
File Pulverizer - Delete your files securely to prevent other people from recovering (undelete)
http://www.toplang.com/filepulverizer.htm

Foldex Corporation
Designers of Pinless Jaw Folders, Quarter Folders, Double Parallel Folders, Former Folders, Formers, Skip Slitters, Press Control Systems, Independent Drive Systems, Shaftless Drive Systems, and Graphical User Interfaces.
http://www.foldex.com/