1. What is Meld? Meld is a visual diff and merge tool targeted at developers.

  2. 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!

    freemium $69.95 / Annually

  3. Beyond Compare allows you to compare files and folders.

  4. Home of the award-winning Araxis Merge two and three-way file comparison (diff) and merging application, Araxis Find Duplicate Files, Araxis Replace In Files, and the Araxis Ketura issue tracking, project scheduling and time tracking application.

  5. A valuable tool for diagnosing continuous integration bugs, Folder Diff also measures how much code must be resolved in pending merge scenarios. Visually compare two versions using image diff within P4Merge to determine changes made.

  6. SmartSynchronize - Comparing Directories the Smart Way. SmartSynchronize is a multi-platform file and directory compare tool. It allows you to compare files or perform 3-way-merges, both with the ability to edit the file contents.

  7. Easily spot the differences in text and image files. Review changes in seconds with the world's most advanced iOS and Mac diff tool.

  8. Merge and compare your documents online and share.

  9. 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.

  10. Kompare is a GUI front-end program that enables differences between source files to be viewed and merged.

  11. WinMerge is an open source differencing and merging tool for Windows.

  12. Mac and Windows client for Mercurial and Git.