COOT

As a software for model building, model completion and validation, Coot provides a wide range of features and functionalities for displaying maps and models. It also allows for various model manipulations such as idealization, real space refinement, manual rotation/translation, rigid-body fitting, ligand search, solvation, mutations, rotamers, Ramachandran plots and more.

COOT, which stands for Crystallographic Object Oriented Toolkit, is a comprehensive software that offers a user-friendly interface for structural biologists and crystallographers to build and refine models with ease. With its powerful tools and resources, Coot is highly recommended for those seeking a reliable software for their crystallographic research.