I assemble some of my old developments in a program VESStudy.
VESStudy - is a tool for the BEM simulation of a vertical electric sounding study of the geological environment with an arbitrary 3D structure.
The development of VESStudy started in 2002. Up to 2011 many tests and modifications ware performed. Initially VESStudy was developed as an additional module for a commercial mesh generator. In 2011 the import of msh files of the free mesh generator Gmsh (http://geuz.org/gmsh/) was implemented. This feature extension allows to use VESStudy as a standalone software.
VESStudy is provided as freeware under the MIT license.