What are some alternatives?
When comparing Ink/Stitch and LinuxCNC (the Enhanced Machine Control), you can also consider the following products
Embroidermodder - Free machine embroidery software supporting a variety of formats.
Blender CAM - Blender CAM is an open source solution for artistic CAM - Computer aided machining - a g-code...
PyCAM - PyCAM is a toolpath generator for 3-axis CNC machining.
CamBam - CamBam CNC software, best value for money, feature rich, CNC Software for G-Code generation on CNC Routers, CNC Mills, Homemade CNC machines, for 2D pocketing, 2D profiling, Text Engraving, Photo Engraving and 3D carving.
Mach3 - Mach3 is very popular among the Hobby CNC community.
Crosti - make your own unique cross stitch design from custom image