Beyond Compare - Beyond Compare allows you to compare files and folders.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Duplicate Cleaner - Duplicate Cleaner: the fastest and most popular tool for finding duplicate files. Over 1 million downloads: Get your copy now! Free and Pro versions available.