Best of the Web

BioMed Central

BioMed Central provides over 100 free peer-reviewed electronic journals in biology and medicine.
Cold Spring Harbor Laboratory Archives

The Archives of the Laboratory contain books, papers, correspondence, and photographs relating to the history of genetics and molecular biology. The website contains their online catalog, links to databases/books, and descriptions of special collections such as the James D. Watson Archives.
Endangered Species
Kimball's Biology Pages
Plants Database
Public Library of Science (PLoS)

PLoS, a non-profit organization of scientists and physicians committed to making the world's scientific and medical literature a freely available public resource. The site contains the free e-journal PLoS Biology.
The National Center for Biotechnology Information (NCBI)

Incredible resource for molecular biology information. Includes publicly accessible databases, some with fulltext access to journals and books, also tools for analysing genome data intended for the researcher. Try searching a living organism by choosing Taxonomy from the drop down menu in the top left-hand corner of the Website.