File Comparison

Compares and merges 2 or 3 files or directories. The file diff shows changes within each line. For Unix and for Windows. Source available under GPL.

Scooter software's Beyond Compare is a Windows utility that combines directory compare and file compare functions in one package. Use it to manage source code, and keep directories in sync.

Visually compare, backup and synchronize folders or files between drives and other directories.

Detect duplicate images existing more than once on a computer system or network. It does not matter if these pictures have different sizes, different contrast, color or gamma values or different file formats. [Windows]