ChemistryAtlas Software and Tool
GSAS-II
Crystallography and diffractionOpen/freechemistry softwarepowder diffractionRietveldcrystallography
General Structure Analysis System for powder diffraction, Rietveld refinement, and crystallographic analysis.
Primary category: Crystallography and diffraction.
Access model: Open/free.
Curated because it is commonly encountered in chemistry research, teaching, analysis, or computational workflows.
Citation: Software resource: GSAS-II