Apps similar to G'MIC include ImageMagick, which is free and open source. Other options are GraphicsMagick and Image Forge. In total there are three Image Editors like G'MIC for Windows, Linux, Mac, iPhone and iPad.
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.
