笔者研究开放存取，在北大完成关于开放存取的博士论文 时，搜集整理了可开放获取的免费学术资源，包括开放存取期刊、学科仓储、机构仓储、合作与竞争性电子出版资源、开放存取仓储搜索以及其他开放存取资源。今 提供与各位学人分享，以期为缓解从事研究的研究生和科研人员获取资料之难提供一些线索。PDF版在附件中。

I 开放存取期刊（Open Access Journals）

1 BioMed Central系列期刊（180余种）. http://www.biomedcentral.com/.

2 PLoS系列期刊 （7种）。http://www.plos.org/journals/index.html.

3 Hindawi Publishing Corporation（115种）. http://www.hindawi.com/index.html.

4 Directory of Open Access Journals(约3300种). http://www.doaj.org.

5 Open J-Gate(由印度信息公司2006年创建的开放存取期刊门户，收录4400多种开放存取期刊，其中2300多 种是同行评审期刊，可以浏览100多万篇期刊论文的全文，每年以30万篇论文的速度更新). http://www.openj-gate.com/. http://j-gate.informindia.co.in/（还包括14000多 种研究与专业电子期刊).

6 HINARI-Health InterNetwork Access to Research Initiative. http://www.who.int/hinari/en/.

HINARI项目由世界卫生组织与主要出版商建立的向发展中国家（人均GDP $100-3000）提供生物医学与卫生文献的项目，包括3280种期刊。

7 Health InterNetwork: http://www.healthinternetwork.org/scipub.php.

 Health InterNetwork由联合国秘书长发起，世界卫生作之领导的旨在跨越健康领域“数字鸿沟”的项目，推动卫生信息与技术 的广泛传播与利用。

8 SciELO: http://www.scielo.br/.科学电子图书馆提供拉美国家科技期刊的开放访问。

9 FreeMedicalJournals.com: http://www.freemedicaljournals.com/.

致力于通过因特网免费获取医学期刊论文的全文。已有70多种期刊，大多为延迟OA期 刊。

II 开放存取仓储库（OA Repositories or Archives）

1学科仓储（Subject Repositories）

E-LIS - http://eprints.rclis.org/ (library and information science)

ArXiv-http://xxx.arxiv.cornell.edu/ (physics, mathematics, non-linear and computer science)

Cogprints-http://cogprints.ecs.soton.ac.uk/ (Cognitive sciences including psychology, neuroscience, linguistics and other related areas)

CiteSeer - http://citeseer.ist.psu.edu/ (computer science)

HTP Prints - http://htpprints.yorku.ca/ (History and theory of psychology)

PubMedCentral - http://www.pubmedcentral.nih.gov/ (US National Library of Medicine's digital archive of life sciences journal literature.

PhilSci Archive - http://philsci-archive.pitt.edu/ (philosophy of science)

RePEc (Research Papers in Economics) 

Behavioral and Brain Sciences - An free open archive for papers in biology, neuroscience, computer science, psychology, linguistics, philosophy.

Computing Research Repository (CoRR) - An open computer science repository, for preprints and papers that are not published elsewhere.

IDEAS - IDEAS (Internet Documents in Economics Access Service) is an archive of working papers, journal articles, and software components in economics.

The NASA Astrophysics Data System-http://adswww.harvard.edu/.(300,000 free full-text articles).

Preprint and Working Papers Archive - A listing of preprint and e-print archives for astronomy and astrophysics, chemistry, physics, computation and language, economics, nonlinear sciences and mathematics. Maintained by Stanford University.

Psycoloquy- An Open Archive of refereed reprints of all target articles, commentaries and responses from Psycoloquy, a peer-reviewed journal of Open Peer Commentary, sponsored by the American Psychological Association, indexed in PsycINFO, and published since 1990.

2机构仓储（Institutional Repositories）

Digital Libraries and Archives Project - A digital library and archive for Virginia Tech, including electronic journals, images, and special collections.
DSpace - Developed by MIT, DSpace is repository software designed to capture the intellectual output of an institution; available for free (currently) download and implementation by any library. Érudit - A repository of prepublications, review articles, and theses, operated by three Quebec universities.

eScholarship - The University of California's repository of institutional publications, including digital journals, books, and working papers, organized by discipline.

NELLCO - A legal scholarship repository from a group of 25 academic institutions in the U.S., including the U.S.

University of California system (Bepress)

University of Connecticut (Digital Commons)

Cornell (Dspace)

Georgia Tech (Dspace)

MIT (Dspace)

University of Toronto (Dspace)

Florida State University (BePress)

University of Southampton (E prints)

III其他开放存取资源

FreeFullText.com. http://www.freefulltext.com/. 提供7000多 种学术期刊的直接链接，可以免费获取期刊论文的全文，有的可能需要免费注册。

Centers for Disease Control and Prevention (CDC)- The CDC Web site provides access to the full text of MMWR and other CDC publications and data archives. Publications are searchable through CDC Wonder.

DOE Information Bridge-The Information Bridge provides an open source to full-text and bibliographic records of United States Department of Energy (DOE) research and development reports in physics, chemistry, materials, biology, environmental sciences, energy technologies, engineering, computer and information science, renewable energy, and other topics. The Information Bridge consists of full-text documents produced and made available by the Department of Energy National Laboratories and grantees from 1995 forward.

GPO Access - The United States Government Printing Office offers free access to the United States Constitution, the Code of Federal Regulations, the Federal Register, Congressional documents, U.S. Supreme Court decisions, and other documents. GPO also provides links to other U.S. government Web sites that offer full text resources.

Inter-university Consortium for Political and Social Research (ICPSR)-ICPSR is "the world's largest archive of computerized social science data." Data files are available to researchers at member institutions.

National Academy Press- Reports from the National Academy of Sciences, the National Academy of Engineering, the Institute of Medicine, and the National Research Council are available online free for the reading from the National Academy Press.

National Center for Health Statistics (NCHS) - NCHS publishes statistical reports on health related issues and is a major source of health statistics. Hundreds of publications, including the full text of "Health United States", are available through the Web site.

National Environmental Publications Internet Site (NEPIS)-The National Environmental Publications Information System began in 1997, to offer over 9,000 full text, online documents of the United States Environmental Protection Agency.

The National Science, Mathematics, Engineering, and Technology Education Digital Library (NSDL)- This site is now under construction with funding from the National Science Foundation. The NSDL will offer high-quality materials for science, mathematics, engineering and technology education. Its initial release is scheduled for the fall of 2002. The NSDL is likely to be the largest and most heterogeneous digital library yet built.

NCSTRL-NCSTRL is an international collection of computer science research reports and papers made available for non-commercial use from a number of participating institutions and archives. NCSTRL provides access to over 20,000 technical reports in computer science.

Project Gutenberg Electronic Public Library- Project Gutenberg produces electronic versions of texts in the public domain, mainly classic books. The project adds over 1,000 books per year.

ResearchIndex- The NECI scientific literature digital library offers five million citations and over 400,000 full-text documents. Papers are derived from proceedings of symposia, journals, books, and other sources. Links to cited works and to comments from readers are available.

Thomas Legislative Information on the Internet-Through Thomas, the Library of Congress offers the text of bills in the United States Congress, the full text of the Congressional Record, House and Senate committee reports, and historical documents.

UNESCO-The UNESCO catalog lists 100,000 UNESCO documents and provides access to the full text of many of these.

United States Geological Survey-Reports and other publications of the United States Geological Survey are available through the USGS Web site.

World Bank Group Documents & Reports-The World Bank Group makes more than 14,000 documents available through the Documents & Reports website. Documents include Project appraisal reports, Economic and Sector Works, Evaluation reports and studies and working papers.

IV合作与竞争性电子出版(Collaborative & Competitive E-Publishing)

BioOne-An aggregation of full text online bioscience journals published by small societies and non-commercial publishers. BioOne is the brainchild of five collaborating organizations: The American Institute of Biological Sciences (AIBS), SPARC (the Scholarly Publishing & Academic Resources Coalition), The University of Kansas, Greater Western Library Alliance (formerly Big 12 Plus Libraries Consortium), and Allen Press, Inc.

HighWire Press- HighWire, founded by Stanford University, ensures that scientific societies and responsible publishers will remain strong and able to lead the transition toward use of new technologies for scientific communication. HighWire assists in collaborating publishers and societies in the online publishing of scholarly journals so that the electronic versions provide added dimensions to the information provided in the printed journals.

History E-Book Project- An electronic publishing initiative from the American Council of Learned Societies for books of high quality in the field of history. This project is a collaboration of learned societies and university presses to assist scholars in the electronic publishing of high-quality works in history, to explore the intellectual possibilities of new technologies, and to help assure the continued viability of the history writing in today's changing publishing environment.

J-Stage- Collaborative effort to make available online the journals and research findings of scientific societies in Japan. Over 50 journals and conference papers and proceedings are available. For the journals, there is a variable time lag ("embargo") from time of publication to availability free online.

JSTOR- A digitized full text archive of scholarly journals starting with the very first issues up until 2-5 years previous to the present. JSTOR's mission is to help the scholarly community take advantage of advances in information technologies and to build a reliable and comprehensive archive of important scholarly journal literature. A collaborative effort funded by its participants, both academic institutions and publishers.

Project Euclid- An initiative from Cornell University Library, in partnership with SPARC, to advance effective and affordable scholarly communication in theoretical and applied mathematics and statistics. Project Euclid partners with low-cost independent and society journals to provide online access to independent and society journals.

Project Muse- Project Muse offers nearly 200 quality journal titles from some 30 scholarly publishers in the fields of literature and criticism, history, the visual and performing arts, cultural studies, education, political science, gender studies, economics, etc. Project Muse was launched by Johns Hopkins University Press and currently partners with not-for-profit publishers.

SPARC- The Scholarly Publishing and Academic Resources Coalition is made up of over 180 member libraries whose goal is to foster competition in scientific communication. SPARC encourages publishers, including scholarly societies, to produce cost-conscious, high-quality journals that directly compete with existing high-cost titles.

V 开放存取仓储搜索(Open Access Repository Searching)

ARC: Cross Archive Searching Service - Arc is a unified search interface providing access to many OAI compliant archives. It is an experimental research service of Digital Library Research group at Old Dominion University.

Department of Energy Preprint Network - The Department of Energy's PrePRINT Network is a searchable gateway to preprint servers with scientific and technical disciplines of concern to DOE.

Directory of Open Access Repositories (DOAR) - aims to "list and categorize academic open access research repositories."  http://www.opendoar.org/.

Registry of Open Access Repositories (ROAR)- http://archives.eprints.org/.

E-Prints -Dedicated to the freeing of the refereed research literature online through author/institution self-archiving. Self-archiving software provided for free for individual or institutional use. This site is part of the Open Citation Project.

Institutional Archives Registry - An effort to track the number and size of open-access eprint archives, from Tim Brody at the University of Southampton.

MetaList of Open Access Eprint Archives - A broad overview of the structure, size and progress of full-text open access e-print archives, from Steve Hitchcock of Southampton University.

OAIster - One of the most complete search engines of Open Access literature, from the University of Michigan.

Open Citation Project - A NSF - JISC jointly funded project to investigate and improve citation linking and reference analysis for online scholarly literature; the 3year project ended in 2002.