KXStitch is described as 'The KXStitch projects aim is to produce software to allow the creation and editing of cross stitch patterns, either from imported images or directly by the user' and is an app in the Photos & Graphics category. There are three alternatives to KXStitch for Windows, Linux, Mac and Android. The best alternative is Crosti, which is both free and Open Source. Other great apps like KXStitch are Cstitch (Free, Open Source) and PCStitch (Paid).
This tool allows you to make your own unique cross stitch scheme from custom image. You can resize and rotate image, reduce the number of colors, change image palette, make cross stitch design, preview it, save and print.
PCStitch is advanced, but it's perfect for any cross-stitcher. Features -- Convert Pictures or images into a patterns instantly! -- Libraries Includes over 2000 library patterns you can use in your own creations.