APBS = Adaptive Poisson-Boltzmann Solver.  It is used to model biomolecular solvation.

Website: http://www.poissonboltzmann.org/apbs

Installed versions:  1.2.1

Acknowledgement: Available:  http://www.poissonboltzmann.org/apbs/citing-your-use

Licensing:  http://www.poissonboltzmann.org/apbs/license