Space Searcher 

We may get completely lost in thousands of files we store on our HDDs without ever knowing which of them are actually worth keeping and which are not. The program allows you to save your money on HDD upgrades by letting you know which files to trash!
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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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WDiff32 

Side by side display of two text files, directories or ZIP archives. Useful to see the differences between two text files or two sets of files, where one or both sets can reside in a ZIP archive. Line editing functions available.
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SynchronEX File Sync/FTP/DAV for Linux 

Robust multi-directional file tree synchronization and backup over local & network paths in any situation: From laptop synchronization to ZIP'ed backup to incremental FTP/DAV website upload. True synchronization of (re)moved files. Scheduled tasks.
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SynchronEX File Synchronizer, Backup/FTP 

Robust multi-directional file tree synchronization and backup over local & network paths in any situation: From laptop synchronization to ZIP'ed backup to incremental FTP/DAV website upload. True synchronization of (re)moved files. Scheduled tasks.
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Active File Compare 

Active File Compare is an advanced utility for the comparison and synchronization of any text files in visual mode. Use this tool to compare two versions of the same file or to correct the source code versions.
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