( For software developers only, general users please checkout Duplicate Cleaner 1.4.7 or 2.0 beta directly )As we previously mentioned, Duplicate Cleaner is the best yet free software for scanning and removing duplicate files on your hard drive, it’s packed with many features that most shareware do not have, where it really shines is that it compares files using md5( SHA-1, SHA-256 ) checksum, and supplies you a powerful selection assistant. If you have several large duplicate files, or many small duplicate files, calculating MD5 checksums first then only comparing the hexadecimal number will take significantly less time than doing a byte to byte compare on each pair of files which have the same size.
Duplicate Files Finder( there’re many software have this name ) is an open source project, it’s written in c#, it allows you find any duplicate files on your computer and delete them or move to recycle bin.
Once you have added the folders for scanning and pressed go, Duplicate Files Finder will scan all files recursively in all subdirectories, generate the md5 checksums and compare them.
Duplicate Files Finder supports file filter, and allows you exclude files less/more than a specified size, you can delete file via the right button menu.
Duplicate Files Finder works on Windows 7 and Windows XP.