Description:

Gmsh is an automatic three-dimensional finite element mesh generator,
primarily Delaunay, with built-in pre- and post-processing facilities.
Its primal design goal is to provide a simple meshing tool for
academic test cases with parametric input and up to date visualization
capabilities. One of the strengths of Gmsh is its ability to respect a
characteristic length field for the generation of adapted meshes on
lines, surfaces and volumes. Gmsh requires OpenGL (or Mesa) to be
installed on your system.