is executed in has website homepage data processing task data visualization software Q http://xray.bmc.uu.se/~aqwww/q/ Allyson Lister Q is a set of tools tailored for some specific kinds of free energy calculations, namely: (I) Free energy perturbation (FEP) simulations. (II) Empirical valence bond (EVB) calculations of reaction free energies. (III) Linear interaction energy (LIE) calculations of receptor-ligand binding affinities.