FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler and a building information modeling (BIM) software with finite element method (FEM) support. It is intended for mechanical engineering product design but also expands to a wider range of uses around engineering, such as architecture or electrical engineering. FreeCAD is gratis en open-source, onder de licentie LGPL-2.0 of hoger, en beschikbaar voor Linux-, macOS- en Windows-besturingssystemen. Gebruikers kunnen de functionaliteit van de software uitbreiden met behulp van de programmeertaal Python.