cppcam is a 3D CAD app for drafting G-Code toolpaths for CNC Routers
AVR simulator IDE
2.5D CAD CAM emphasis on CAM and toolpaths
3D CAM program for CNC mills/lathes
Cuts 3D objects from polystyrene foam (EPS/XPS)
4.4BSD-based UNIX-like operating system for CNC / machine control
Logs IP to IP contact, number of packets, bytes.