WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Compare - Download Notepad++ Compare plugin for free. Comparison plugin for Notepad++ editor. Comparison plugin for Notepad++ editor.
kdiff3 - KDiff3 is a file and directory diff and merge tool which compares and merges two or three text...
UltraCompare - UltraCompare is the name of an advanced level of file and folder comparison platform that is loaded with an advanced level of features and functions.
Diffinity - A diff and merging tool with focus on accurate and easy to read source code diffs.
GNU Diff Utilities - GNU Diffutils is a package of several programs related to finding differences between files.