FreeCAD - An open-source parametric 3D modeler
OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
MacDraft - MacDraft Professional, powerful 2D CAD, drafting, technical illustration, architectural drawing and...
Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
ImplicitCAD - ImplicitCAD is a programmatic CAD program, implemented in Haskell.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.