XSophe is a matrix diagonalization EPR simulation package developed by the Centre for Magnetic Resonance, University of Queensland, Australia, and by Bruker. It is particularly useful for S>1/2 systems, including integer spin systems and spin-coupled systems. Direct values for the inter-metal distances are returned. The program can simulate in both rf perpendicular to H0 and rf parallel modes and at any temperature. A wide variety of line shape models is available, including strains in the Zeeman or zero-field splitting terms (contact: Dr. Brian Bennett).