G'MIC is described as 'Full-featured open-source framework for image processing, distributed under the CeCILL free software licenses (LGPL-like and/or GPL-compatible). It provides several different user interfaces to convert / manipulate / filter / visualize generic image datasets' and is a Image Editor in the photos & graphics category. There are three alternatives to G'MIC for a variety of platforms, including Windows, Linux, Mac, iPhone and iPad apps. The best G'MIC alternative is ImageMagick, which is both free and Open Source. Other great apps like G'MIC are GraphicsMagick and Image Forge.
ImageMagick is a software suite to create, edit, and compose bitmap images. It can read, convert and write images in a variety of formats (about 100) including GIF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, TIFF, and DPX.
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GraphicsMagick is the swiss army knife of image processing. Comprised of 282K physical lines (according to David A. Wheelers SLOCCount) of source code in the base package (or 952K including 3rd party libraries) it provides a robust and efficient collection of tools and libraries...
Resize, compress, convert, watermark and crop images by the hundreds in one clean offline desktop studio. No Photoshop, no subscription, no cloud uploads — everything runs locally.
