CloneScan

The Free Fast Duplicate File Finder will find duplicate files in a folder, computer or entire network. The application will compare the content of the files and will find duplicates even if they are using different file names. The Professional version can find similar files regardless of their file types. It will analyze the file data in order to find duplicates and not just file attributes like name and size as the standard clone removers do. It uses advanced algorithms while searching for related files and provides accurate results, which is not true for the commonly advertised FUZZY search methods. The duplicate remover uses fast binary comparison algorithm and has internal preview supporting a lot of image, video, music and text file formats. It can also preview the common file formats.

Duplicate & Same Files Searcher is an advanced tool for locating and dealing with duplicate files. The program locates files with identical content only; unlike some similar tools, you can't compare files just on their names, dates or size. This makes Duplicate & Same Files Searcher relatively slow, as it must read and process every single file in your selected group. Fortunately, there are some ways to improve performance. You can direct the program to scan a particular folder tree only, to examine files of a particular type, to ignore others, to check only files of a defined size. There are some options you won't often see elsewhere. You can have the program check for (or ignore) differences in alternate data streams, to ignore different ID3 tags in MP3s, to skip symbolic links (or not). When the scan is complete, each set of duplicates is listed, along with their file names, paths, size, dates, even their number of fragments (whether they're fragmented or not).