WinMerge
(https://www.juvevn.net/proxy.php?request=http%3A%2F%2Fwinmerge.org%2Fabout%2Fscreenshots%2Fscreenshot_small.png&hash=6ce385090cd03d52a61c71fc378539e79bb895ed)
WinMerge is an Open Source differencing and merging tool for Windows. WinMerge can compare both folders and files, presenting differences in a visual text format that is easy to understand and handle.
http://winmerge.org/