Gmsh - Gmsh is a 3D finite element grid generator with a build-in CAD engine and post-processor.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Altair - Visually Analyze Any Data at the Speed of Business
GNU Octave - GNU Octave is a programming language for scientific computing.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
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.