A TDDFT code
Octopus is a scientific program aimed at the ab initio virtual experimentation on a hopefully ever increasing range of systems types. Electrons are described quantum-mechanically within Density-Functional Theory (DFT), in its time-dependent form (TDDFT) when doing simulations in time. Nuclei are described classically as point particles. Electron-nucleus interaction is described within the Pseudopotential approximation.