There are 3 repositories under cnc-router topic.
Feature rich CNC/Laser firmware with support for more than 30 of the most popular 3D printer boards from a variety of manufacturers.
Restoration and documentation of custom-built 4x4' CNC router at Twin Cities Maker hackerspace (aka the Hack Factory) in Minneapolis, MN.
Unix-like operating system for CNC / Machine Control applications
FabBSD Ports and Packages
Location for orginal CNC assets, and sources of existing/modifies ones e.g. DXF, SVG files for designs/plans.
Haskell library for creating SVG patterns for CNC routers