• FEFF 8: FEFF 8 improves over previous versions of FEFF by including self consistent calculation of potentials to provide charge transfer and a more accurate estimate of the Fermi level. It also includes full multiple scattering calculations to improve XANES calculations, where multiple scattering expansions can fail to converge. FEFF 8 can output the angular momentum projected density of states.
• FEFF 7: This code offers improved input/output with an optional binary file structure for the feffnnnn.dat files, new Dirac-Fock atom densities and improved scattering potentials and self-energies, improved XANES capabilities including a fully relativistic cross-section that includes both l --> l-1 and l --> l+1 transitions, polarization dependance and many other features.
• Earlier versions of FEFF and the FEFF Tables are also available.
• Atoms: Generates input files, feff.inp, for crystalline materials which are suitable for FEFF5 and higher.

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