Blender

Far more than a 3D art tool — the mesh modeling, sculpting, and precision modeling workflows are legitimate for engineering visualization and concept design.

3d-modelingopen-sourcevisualization

More in CAD & CAM

Onshape

Browser-based parametric CAD that punches above its weight. Free for hobbyists, version-controlled by default, and far more accessible than SolidWorks for getting started.

parametricbrowser-basedfree

Fusion 360

The professional CAD/CAM tool that is actually free for hobbyists. Parametric modeling, integrated CAM, and simulation in one package — the right tool when FreeCAD falls short.

parametriccamprofessional

McMaster-Carr

Every hardware engineer's open secret — the catalog has STEP models for most parts, so you can drop a real McMaster bolt into your assembly and order it the same day.

hardwarecad-modelssourcing