Bioscreening.com
   Directory of suppliers of organic compounds, compound libraries, custom synthesis and natural products for screening.
   http://www.bioscreening.com

Organic Chemistry Resources
   Includes over fifty organic chemistry links, part of the WWW Virtual Library.
   http://www.liv.ac.uk/Chemistry/Links/reforganic.html

Organic Chemistry Resources Worldwide
   An intuitive WWW resource guide for synthetic organic chemists.
   http://www.organicworldwide.net