WinCoot

WinCoot is a comprehensive, free, and open-source desktop application designed for macromolecular model building, analysis, and validation. It provides powerful tools for visualizing protein and nucleic acid structures, enabling researchers to inspect electron density maps, correct model errors, and refine atomic coordinates. Its intuitive interface supports a wide range of tasks from simple viewing to complex model manipulation, making it an essential tool for structural biologists, biochemists, and students. As open-source software, it benefits from continuous community-driven development and transparency.