Public Library of Science (PLoS) (OA)

PLoS publishes peer-reviewed, open access scientific and medical journals. They include original research as well as timely feature articles. All PLoS articles are immediately freely accessible online, are deposited in the free public archive PubMed Central, and can be redistributed and reused according to the terms of the Creative Commons Attribution License.

http://www.plos.org/publications/journals/