BioMed Central Publisher of 220 peer-reviewed open access journals
Microbiology @ Nature (Find Nature full text in libraries' database, i.e. Academic Search Complete--one year embargo)
MetaLib, a service of the Catalog of U.S. Government Publications (53 government databases, subject gateways, digital repositories and e-journals)
OAIster More than 19 million digital resources from over 1,000 organizations developed by the University of Michigan.
Science Portal (U.S. Government)
WorldWideScience.org is a global science gateway comprised of national and international scientific databases and portals.