FileMerge lets you compare one file to another or one directory to another and merge the files or directories together.




Meld is described as 'Open-source tool for dynamic file and folder comparisions, syntax highlighting, offline functionality, and version control integration' and is a very popular Diff Tool in the file management category. There are more than 50 alternatives to Meld for a variety of platforms, including Windows, Mac, Linux, Web-based and BSD apps. The best Meld alternative is WinMerge, which is both free and Open Source. Other great apps like Meld are Beyond Compare, KDiff3, P4Merge and Araxis Merge.
FileMerge lets you compare one file to another or one directory to another and merge the files or directories together.




GumTree is a complete framework to deal with source code as trees and computing differences between them.

DiffFork is a diff tool for Mac OS X. DiffFork can compare both folders and files, presenting differences in a visual format.

Compare Files Using ' Diff Doc' a visual file compare and folder compare utility that creates a detailed file diff. File comparison can optionally be done with the command line. Compare Word and Compare XLS files in addition to PDF, txt, rtf...
Online Text compare is a browser based data compare tool that highlights the differences between two versions.

xxdiff is a QT based graphical file and directories comparator and merge tool. It provides comparing two files, three files.

CompareMerge is a Mac OSX's software tool for file comparison and merging text-like files.



AptDiff is a visual text / binary files comparison and merging utility for Windows. It is highly useful for web designers, software developers, and other professionals.




Compare text files or entire directory hierarchies, export and apply patches, and perform non-destructive find and replace operations on text files.




Doesn't handle multiple files, UI is terrible and unintuitive.