LaserGRBL Linux solution, LaserGRBL is one of the best software.
Transformation utility to rotate coordinates in G-Code files
cppcam is a 3D CAD app for drafting G-Code toolpaths for CNC Routers
AVR simulator IDE
Open Source Digital Laboratory - CAM module
Modular CNC software for Arduino controller
3D CAM program for CNC mills/lathes
Arduino Powered 60 RBG Pixel Clock, with 24h alarm and count down.
Parallelism without the Pain
A CAD/CAM Package for CNC GCode Creation
qnutCNC is a program to control the ethernut development board
Cuts 3D objects from polystyrene foam (EPS/XPS)