Open Babel is a chemical toolbox designed to speak the many languages of chemical data. It's an open, collaborative project allowing anyone to search, convert, analyze, or store data from molecular modeling, chemistry, solid-state materials, biochemistry, or related areas.

Ready-to-use programs, and complete programmer's toolkit

Read, write and convert over 90 chemical file formats

Filter and search molecular files using SMARTS and other methods

Generate 2D and 3D coordinates for SMILES, InChI and other formats

Supports molecular modeling, cheminformatics, bioinformatics, organic chemistry, inorganic chemistry, solid-state materials, nuclear chemistry...

Open Babel is distributed under the GNU General Public License (GPL). This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License. Full details can be found in the file "COPYING" which should be included in your distribution.

For more information, check the Open Babel website.