zsCompare 

Manually or automatically compare files, folders, text files, source code, Word documents, Excel spreadsheets, and pdf files. You can even compare files within zip files. Includes zsDuplicateHunter a powerful duplicate file finder for free!
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EF Duplicate Files Manager 

EF Duplicate Files Manager could find out duplicate files with same name, same size, same content on specify paths. Handle optional like folders the archive files. Multilingual. Shareware, FREE Updates.
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XP Disk Cleaner 

XP Disk Cleaner is a powerful tool for cleaning disks from information that clogs your system and reduces the performance of your computer. With the help of this tool you can search and delete temporary files and folders and other applications
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Dupe Checker PRO 

Dupe Checker PRO will find all dupe files and folders for the same names, file duplicated content and size, empty files and folders.
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Duplicate Finder 

Find and remove true duplicate files. Search duplicate file contents regardless of file name, Duplicate MP3s, photos, and any file type can be searched. Duplicate Finder matches byte by byte or CRC32 to give you most accurate results.
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