Blender - Blender is the open source, cross platform suite of tools for 3D creation.
RT-LAB - OPAL-RT’s mission is to provide cutting-edge real-time simulation technology to engineers and researchers around the world.
FreeCAD - An open-source parametric 3D modeler
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
SIMUL8 - Simulation is an effective system that permits you to make striking, certain choices since it gives you the confirmation to make certain you are settling on the right decision.
Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.