Blender has several scripts included, and several plugins.
Whats not yet included are certain inlcuded complex geometries as usefull for 3d printing.
Let me explain currently i’m working on a screw-bolt fit combination, with a offset in between.
Its becomming quite large node script, and i like to know if it could be turned into a project (there are some more 3d printing shapes that are technical / math chalanges, and be useful for technical 3d printing community.