CYTools: A Software Package for Analyzing Calabi-Yau Hypersurfaces in Toric Varieties. CYTools is an open-source software package developed by Liam McAllister’s group with the purpose of studying Calabi-Yau manifolds arising from the Kreuzer-Skarke database. It emerged from several years of effort towards exploring previously uncharted parts of the string landscape. It offers vastly superior computational performance compared to other software that are typically used in the field. Installation instructions and detailed documentation can be found in the CYTools website.