Kompare

Kompare is comparison program for KDE

Kompare is a free software graphical computer application, integrated to Dolphin, which helps the user to compare two different text files or two directories.

Quickly find what changed in your file

Kompare does not actually compute the differences between the compared files itself, but is merely a graphical front end to the command line interface diff utility. However, the colour coding of changed lines makes them very easy to spot.

It is a standard tool, coming packaged in the kdesdk module.

Kompare was previously known as kdiff.