FolderMatch 

Use FolderMatch to compare and sync your files and folders so you will always have the most current data. Ideal for people in business, for people who burn CDs, or for anyone who keeps multiple copies of files. Stay in sync with a button click.
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fileWATCH 

File monitor and registry monitor. Track file system and registry changes. Monitors the changes in the hard drive(s) and registry on your system using saved catalog files.
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FileTiger 

FileTiger 1.3 Dual-Window Synchronizer and backup tool for 32-bit Windows(XP, Me, 98/SE, 2000). Emphasizes speed, by providing two folders side by side, for moving, copying, backing up, and getting organized. From Science Translations Software.
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Rocket Retriever 

Rocket Retriever indexes your hard drive's file names, and lets you search for names (or partial names) as you type. Find files fast - missing, misplaced, or even renamed. Includes syntax highlighting and pattern matching for easier searching.
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Mihov Link Checker 

Mihov Link Checker is a simple program that is used to verify links on a list, a local page or on a web page directly from the internet. It checks whether the linked files are missing, forbidden or somehow not correct.
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GedSmart 

GedSmart is a tool that can compare two gedcom-files and find matches based on the applied ruleset.
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