#Software - [ChemOffice Professional](http://www.cambridgesoft.com/Ensemble_for_Chemistry/ChemOffice/ChemOfficeProfessional/) **Commercial software** for drawing molecular structures, 3D models and many more. High price but most higher education institutes will provide students/staff with free institutional licenses. - [MarvinSketch](https://www.chemaxon.com/products/marvin/marvinsketch/) **Freeware** (closed-source) for drawing molecular structures with a wide feature set. In addition to just being able to draw Lewis structures, the software includes plugins to name what you have drawn (systematic/traditional), predict properties, change atom and bond properties, generate stereoisomers, and much more. It is Java based so works on Mac, Windows, Linux and is even available on the [web](http://www.webqc.org/moleculareditor2.php). - [ChemDoodle](https://www.chemdoodle.com/) **Commercial software** for 2D and 3D molecular structures and diagrams and much more. Also has versions for tablet/mobile. An online free version of ChemDoodle is here: [ChemDoodle Web Components](https://web.chemdoodle.com/demos/sketcher/) - [ChemSketch](http://www.acdlabs.com/resources/freeware/chemsketch/) **Commercial software** for Windows only. Includes a **free version** with fewer features. - [Avogadro](http://avogadro.cc) **Free, open source** software for generating 3D models and computational chemistry. - [GAMESS](http://www.msg.ameslab.gov/gamess/capabilities.html) **Free** ab initio molecular quantum chemistry program