A tool to extract numerical data from graphs in pictures. Operations of GSYS is based on the GUI and it is easy to generate the numerical data from the given graph.
An application program for lattice dynamics calculation of molecules, surfaces, and solids in various boundary conditions. It lays emphasis on analytic calculation of lattice dynamics while it can perform molecular dynamics simulation as well. It supports various force fields to treat ionic materials, organic materials, and metals. It also implements analytic derivatives of the second and third order for many force fields.