midas Gen - Structural Analysis and Design
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
STAAD.Pro - Structural Analysis and Design.
FreeCAD - An open-source parametric 3D modeler
SkyCiv Structural 3D - SkyCiv Structural 3D is a powerful structural analysis and design software on the cloud.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming