Adaptive Poisson-Boltzmann Solver (APBS) is a software package for modeling biomolecular solvation through solution of the Poisson-Boltzmann equation (PBE), one of the most popular continuum models for describing electrostatic interactions between molecular solutes in salty, aqueous media......
Installation is very simple. There are many binaries there and you can use the binaries directly. Do note that the latest binaries (apbs-1.3) uses will require glibc 2.7 and greater. If you are using CentOS 5, you may want to use apbs-1.21 binaries or below.
For details on Compiling adaptive Poisson-Boltzmann Solver (APBS) on CentOS 5 on Linux Cluster
