Open-source
Avagadro: Free, Open source 2D/ 3D Molecular for Windows, Linux, & macOS
Avogadro: The Molecular Editor and Visualization Avogadro is a free, open source desktop molecular editor and visualization tool, designed for use on Mac, Windows, and Linux in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas. It offers flexible high-quality rendering and a powerful plugin architecture. It's