Gmsh - Gmsh is a 3D finite element grid generator with a build-in CAD engine and post-processor.
OpenFOAM - OpenFOAM® - Official home of The Open Source Computational Fluid Dynamics (CFD) Toolbox.
TetGen - A Quality Tetrahedral Mesh Generator and a 3D Delaunay Triangulator
ANSYS Fluent - ANSYS engineering simulation and 3D design software delivers product modeling solutions with unmatched scalability and a comprehensive multiphysics foundation.
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