Pre-Processing contains scripts and plugins for optimizing the mesh and some tools to export evaluation grids.
To see how to integrate a script as plugin into Blender go to the [Mesh2Input_0.4.0] section.
Wiki: EvaluationGrid_0.4.0
Wiki: Mesh2HRTF 0.4.0 and below
Wiki: Mesh2Input_0.4.0
Wiki: MeshGrading Plugin for OpenFlipper_0.4.0