Typical output from open-souce CAM algorithms. These have been available for some time now, but there’s been very little interest in a GUI or stand-alone CAM-application. Maybe these will eventually find their way into the FreeCAD CAM-module?
http://www.anderswallin.net/2014/02/opencamlib-and-openvoronoi-toolpath-examples/
http://www.anderswallin.net/2014/02/opencamlib-and-openvoronoi-toolpath-examples