This is the extensible drawing editor Ipe. Ipe allows you to create figures in PDF format, for inclusion into LaTeX (or plain TeX) documents as well as stand-alone PDF documents, for instance to print ...
BlenderArtist Thread: https://blenderartists.org/t/sorcar-procedural-modeling-in-blender-using-node-editor/1156769 Edit node parameters at any point without the fear ...