PLoS Biology has Impact Factor of 13.9
The Open Access journal PLoS Biology, launched in 2003, received its first ISI impact factor. The impact factor of 13.9 puts PLoS Biology at the top of the ISI group for Biology Journals.
via STS list by Flora Grabowska, originally published in the 1/27/2006 PLoS e-Newsletter .
Other open access journals published by the Public Library of Science include
PLoS Medicine http://medicine.plosjournals.org
PLoS Computational Biology http://compbiol.plosjournals.org
PLoS Genetics http://genetics.plosjournals.org
PLoS Pathogens http://pathogens.plosjournals.org