VESTA for Linux Mint (Debian file)
Linux Mint is one of the best operating system with a good GUI, open-sourced and can be installed on old PCs also. And VESTA is a computer package to analyze crystal structures & geometry, X-ray diffraction simulation (XRD), and to investigate Miller indices {h k l} data for crystal systems, space groups of crystalline materials etc. It is a 3D visualization program for structural models, volumetric data such as electron/nuclear densities, and crystal morphologies. it also deals with multiple structural models, volumetric data, and crystal morphologies in the same window. But its Debian version for Linux Mint operating system is not available for direct download. You can download the VESTA.deb for Linux Mint from here.