Biology Links - from Harvard University
http://mcb.harvard.edu/BioLinks.html

Kimball's Biology Pages - John W. Kimball
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/

Biology in Motion - Dr. Leif Saul
http://biologyinmotion.com/

BiologyBrowser
http://www.biologybrowser.org/

The Biology Project - The University of Arizona Department of Biochemistry and Molecular Biophysics
http://www.biology.arizona.edu/

NBII (National Biological Information Infrastructure) - Biological Informatics Office of the U.S. Geological Survey
http://www.nbii.gov/portal/server.pt

Project Noah
People from around the world submit photos of wildlife in their backyards and contribute to other wildlife projects.
http://www.projectnoah.org