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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Duplicate files manager 

Duplicate files manager help you find out and clean duplicate files,expand disk space and optimize disk. You could find files with same content , same file name or same size . And compare two folders,find out same files between these two groups .
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