GIMP

GIMP (GNU Image Manipulation Program) is an image retouching and editing tool and is released under the GPLv3 license as free and open-source software.

There are versions tailored for most operating systems including Microsoft Windows, Mac OS X, and Linux.

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GIMP has tools used for image retouching and editing, free-form drawing, resizing, cropping, photo-montages, converting between different image formats, and more specialized tasks.

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