Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
SketchUp - 3D for Everyone
GNU Octave - GNU Octave is a programming language for scientific computing.
nanoCAD - nanoCAD is a pro-grade 2D CAD system with native DWG support and full customizability.
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.