Blender - Blender is the open source, cross platform suite of tools for 3D creation.
MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming
Quixel Mixer - Mixer is a PBR creation suite that uses brushes and non-destructive layering to generate all types of maps.
GNU Octave - GNU Octave is a programming language for scientific computing.
3D-Coat - 3D-Coat is the one application that has all the tools you need to take your 3D idea from a block of digital clay all the way to a production ready, fully textured organic or hard surface model.
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.