Meld is an opensource visual diff and merge tool for developers.

KDiff3 (64-Bit) is a graphical text difference analyzer for up to 3 input files, provides character-by-character analysis and a text merge tool with integrate…

Code Compare is a free tool designed to compare and merge differing files and folders.

Beyond Compare is a handy comparison tool to compare files.

Comparison plugin for Notepad++ editor.