Altair Inspire - Altair Inspire enables design engineers, product designers, and architects to create and investigate structurally efficient concepts quickly and easily.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
VectorEngineer - VectorEngineer is a CAD software system that you can use to create technical 3D drawings.
Sketch - Professional digital design for Mac.
ANSYS SpaceClaim - SpaceClaim 3D Modeling Software Solves Geometry Problems Fast.
Affinity Designer - Professional creative software, exclusively for Mac.