CCP4 exists to produce and support a world-leading, integrated suite of programs that allows researchers to determine macromolecular structures by X-ray crystallography, and other biophysical techniques.

Coot, Crystallographic Object-Oriented Toolkit, is for macromolecular model building, model completion and validation, particularly suitable for protein modelling using X-ray data.

PHENIX is a software suite for the automated determination of molecular structures using X-ray crystallography and other methods.