* [http://www.evilmadscientist.com/2016/hilbert-curve-cat/?utm_source=dlvr.it&utm_medium=gplus Image2Hilbert] plus the [https://shooshx.github.io/Image2Hilbert/ Tool] / ''Shy wrote in to tell us about a tool he created to generate Hilbert curves from images for plotting called Image2Hilbert.''
* [https://salt.bountysource.com/teams/hangprinter Hangprinter] / Is Hangprinter the world's only frameless 3d printer?
* [https://www.instructables.com/Build-a-Simple-3D-Sphere-Drawing-Robot-EggBot-EggD/?utm_source=newsletter&utm_medium=email Build a Simple 3D Sphere Drawing Robot (EggBot, EggDuino and SphereBot)] (2024)