ExTools for FreeCAD (Extension tools for FreeCAD) are unofficial plugins for [FreeCAD](URL https://github.com/FreeCAD).
You can draw a polyline according to a mathematical formula with this tool. The formula is defined by Python format math function.
You can confirm surface area, volume and center of mass for selected object with this tool.
In your use, please read document/index.html of this project.
ExTools for FreeCAD is licenced under LGPL version 2.1 / version 3.
Windows - Click "install.js".
Linux/Mac OS X - Run "install.py" on Python 2.7.x.