Software Open Access
A collection of command-line programs for modeling the gravitational potential, acceleration, and gradient tensor. Tesseroids supports models and computation grids in Cartesian and spherical coordinates.
Official website and documentation: http://tesseroids.leouieda.com/
The first ever release of Tesseroids. This initial version was made in Python with very little optimization. I'm not sure it will work with the current version of numpy and scipy.