Computational Chemistry (Score 1)

Since I haven't seen it, here are several free programs useful for computational chemistry:

GAMESS Free Electronic Structure Package

ViewmolMany types of visualization

gOpenMolVisualization and property Calculation

RasMolVisualization

EgoMolecular Dynamics Program

TinkerMultifacited Package

X-PLORMolecular Dynamics Tailored for Biological Systems