HEATKEYS

The International Union of Pure and Applied Chemistry (IUPAC) serves to advance the worldwide aspects of the chemical sciences and to contribute to the application of chemistry in the service of Mankind. As a scientific, international, non-government...

Free chemical structure search engine. Millions of public domain structures. Very fast substructure searching. Results link to data about these structures.

ChemAxon is a company for software development. Programs, Java applets and other Java tools for chemistry, client-server applications, chemical databases.

ChemSpider is a free chemical structure database providing fast access to over 26 million structures, properties and associated information.

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

Your Partner in Chemistry Software for Analytical and Chemical Knowledge Management, Chemical Nomenclature, and In-Silico PhysChem and ADME-Tox

ACD/I-Lab

Open Babel forum. Open Babel is a cross-platform program and library designed to interconvert between many file formats used all branches of chemistry. Find out more at http://openbabel.org .