The Open Access Directory is a guide to open access resources and includes a number of lists of open access facts running the gamut from disciplinary repositories to higher education institutions with open access mandates for their faculty. The directory is hosted by Simmons College and maintained by the open access community.
Directory of Open Access Journals
Search articles across 10,000 open access peer-reviewed journals covering a variety of disciplines. To be included in the DOAJ, journals must meet strict criteria for transparency in their editorial and publishing processes.
Registry of Open Access Repositories
Explore open access institutional and disciplinary repositories from around the world.
An annual global event dedicated to increasing awareness of Open Access. OA Week will be held from October 19 - 25, 2015, and the website lists events that allow researchers and students to learn more about Open Access.
Scholarly Publishing and Academic Resources Coalition (SPARC)
An organization of academic and research libraries working to advocate for open, sustainable scholarly communication. The SPARC website provides the latest news on national and international developments in scholarly communication and publishing and houses resources for authors, students, administrators, and librarians.
arXiv.org
Operated by Cornell University, arXiv.org houses articles in physics, mathematics, computer science, quantitative biology, quantitative finance, and statistic.
PubMed Central
National Institutes of Health's National Library of Medicine database of biomedical and life sciences journal literature in the U.S. Many articles arrive in PMC through mandates from national or other funding agencies.
PLOS
The Public Library of Science (PLOS) publishes original articles in a number of science-related fields including biology and genetics.