Sketch - Professional digital design for Mac.
Ink/Stitch - An Inkscape extension for designing machine embroidery patterns.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Crosti - make your own unique cross stitch design from custom image
Affinity Designer - Professional creative software, exclusively for Mac.
Embird - Machine-Independent Embroidery Software