Visit website ↗Download ↓ DeveloperA Brünger et al/NIHCategoryBiomolecular & Fibre AnalysisPlatformLinuxmacOSLicenseFree for Academic Use A sophisticated package for biomacromolecular structure determination and refinement against crystallographic, NMR and solution-scattering data. CNS (Crystallography and NMR System) is a collaborative extension of the original X-PLOR program.