WinMerge - WinMerge is an open source differencing and merging tool for Windows.
kdiff3 - KDiff3 is a file and directory diff and merge tool which compares and merges two or three text...
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Devart Code Compare - Code Compare is an advanced file and folder comparison tool. Its intuitive interface allows you to merge differing files and folders fast and easily! And it's FREE!
Beyond Compare - Beyond Compare allows you to compare files and folders.
Compare - Download Notepad++ Compare plugin for free. Comparison plugin for Notepad++ editor. Comparison plugin for Notepad++ editor.