Free Beyond Compare Alternatives

WinDiff is a graphical file-comparison program published by Microsoft (from 1992[1]), and is distributed with certain versions of Microsoft Visual Studio as well as in source-code form with the Platform SDK code samples.

Ediff is a comprehensive visual interface to Unix diff and patch utilities.

Ediff provides a convenient way for simultaneous browsing through the differences between a pair (or a triple) of files or buffers (which are called ‘variants’ for our purposes). The files being compare.

DiffPlug is a free text editor/differ and image viewer/differ. Purchasing a license allows you to diff other kinds of files such as Simulink.

Great for synchronizing large collections of media files such as MP3s, Videos, etc... without copying every file. Save time by only copying the files that are new or different. Use "Clone Mode" to synchronize a folder to match a master folder.

LopeEdit is a powerful programmers editor and a replacement of Windows Notepad. It has tabs to select between open files, supports syntax highlighting of multiple programing languages (C/C++, Java, JavaScript, Visual Basic, VBScript, XML, HTML, ASP, JSP, SQL, Cobol, C#, CSS...

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

Diffchecker will compare text to find the difference between two text files. Just paste your files and click Find Difference!.

Just fun with XAML ;).

ApexSQL Compare is a tool that can compare files, SQL Server objects, and folders. It can be integrated as an add-in into SQL Server Management Studio and Visual Studio or it can be used as a desktop application.