gmshToFoam tutorial
 

Gmsh is an open source 3D finite element mesh generator with a built-in CAD engine and post-processor. Its design goal is to provide a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities.

Below a tutorial of how to generate a mesh using gmsh and convert it for use in OpenFOAM.

https://www.youtube.com/watch?v=OVnglwI90Hg