PLOS - The Public Library of Science
Today’s Science – This resource connects science as it’s taught in classrooms with the discoveries being made every day by scientists around the world.
Creative Commons Science - a compliation of science-related sites with Creative Commons' licensed information.
Science Daily - "Your source for the latest research news"
Lab Tests Online - "A public resource on clinical lab testing from the laboratory professionals who do the testing."
Google Scholar - scholarly resources compiled by Google
NASA-Funded Research Results - free access to research funded by NASA