Apps similar to Icdiff include Diffinity, which is free. Other options are Kompare, GNU Diff Utilities and Riff. In total there are four Diff Tools like Icdiff for Linux, Windows and Mac.
Diffinity is a diff and merging tool with focus on accurate and easy to read source code diffs. It will compare the content of two files and present the differences in an easy to read line by line and char by char basis.
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Kompare is a graphical diff and merge tool targeting developers. It allows users to compare two different text files or two directories. It is part of KDE Applications (and formerly part of KDE Software Compilation) and therefore primarily used on Linux and other Unix-like...
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GNU Diffutils is a package of several programs related to finding differences between files.
