WinMerge/winmerge
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.
GitHub repository with 8,863 stars and 981 forks.
Language: C++
Topics: c-plus-plus, winmerge, windows, diff, merge, image, image-diff, mfc, compare-files, win32