The "wirecutter" plugin for inkscape is a plugin to generate g-Code for
a 2D wirecutter with a turning table.
You can either draw one open path which is the path which the machine
will cut or you can draw some closed paths. These closed paths
(e.g. Letters) must be connected because the cutter cannot leave the
raw material like a milling machine.
RFXCAM is an opensource CAD / CAM package targeted at CNC machines (Mills, routers...). The idea is to create the basic interface for geometry manipulation and toolpath creation. Heavy python plugin support will allow a future community to create a vast selection of unique plugins for added functionality specific to their needs.
Tutorial 1:
https://www.youtube.com/watch?v=bNvE2H8b6Yc&feature=youtu.be