ChemWiki

The ChemWiki is a collaborative approach toward chemistry education based on an open access wiki environment to supplant conventional paper-based books and an effort to supply chemistry knowledge to the community. It's development is currently directed by UC Davis Professor Delmar Larsen.

The ChemWiki provides students and teachers with an explanation of the core, textmaps, wikitexts, homework, worksheets and visualizations. The materials covered include: organic, inorganic, physical, and analytic chemistry.

http://chemwiki.ucdavis.edu/