FreeCAD - An open-source parametric 3D modeler
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
MakerSCAD - Powerfull 3D design tool for 3D printing, virtual reality and game engine.
Invision - Prototyping and collaboration for design teams
DynaMaker - Cloud service for Visual Product Configuration with parametric geometry and CAD / BIM
Sketch - Professional digital design for Mac.