Avogadro2

Avogadro is a molecular editor and visualization tool, designed for students and researchers alike. Used in computational chemistry, molecular modeling, chemistry education, bioinformatics, materials science, and more. Downloaded over 2.9 million times and used in over 11,000 academic publications and counting. You can easily build and edit molecules, polymers, biomolecules, and materials, including a new rendering engine capable of easily handling tens of thousands or millions of atoms, even with real-time shadows and depth effects for improved graphical quality. Plugins add diverse functionality – interactive tools, commands, interfaces to other programs, additional force fields and file formats, and more. Above all, Avogadro is free, and all source code and documentation is available under the permissive BSD 3-clause license.