Open Access
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1   Link   PloS: Public Library of Science
PLoS is a nonprofit organization of scientists and physicians committed to making the world s scientific and medical literature a freely available public resource.
2   Link   Open Science Directory
Search tool for open access journals and journals in special programs for developing countries.
3   Link   Highwire Press
Highwire Press is an e-publishing company based at Stanford University which operates many society e-journals.
4   Link   Gateway for Free E-journals
700 Free E-journals covering Subjects like Business & Managment, Chemistry, Earth Sciences, Engineering, Environmental Sciences, General Works, Health Sciences, Information Technology, Library Science,Life Sciences, Material Science, Mathematics, Media and Communication, Physics & Social Sciences.
5   Link   Free Medical Journals
A web site collecting links to medical journals that offer their contents online free of charge. In addition to linking to free online medical journals
6   Link   Electronic Journal
Electronic Journal "Technical Acoustics" (EJTA) is free to readers scientific and technical journal. EJTA is a refereed journal publishing original articles in all areas of acoustics:
7   Link   EconPaper
Working papers and articles in economic. Some free access is available to articles but many require payment
8   Link   Plant Methods
An Open Access, peer-reviewed online journal that will encompass all aspects of technological innovation in the plant sciences.
9   Link   PubMed Central
PubMed Central (PMC) is the U.S. National Library of Medicine s free digital archive of biomedical and life sciences journal literature.
10   Link   ChemIDplus
Database of over 380,000 chemicals, synonyms, structures, regulatory list information, and links to other databases.
11   Link   IN-TECH Scienctific Database
Free online database of high quality, up-to-date scientific content covering fields of Artificial Intelligence, Robotics, Manufacturing and Operations Research.
12   Link   Information Bridge
The Information Bridge contains documents and citations in Physics,Chemistry,Materials,biology,Environment Sciences,Energy Technologies,Engineering,Computer and Information Sciences, Renewable Energy and other topics of interest related to DOE
13   Link   ISIHighlyCited.com
This freely accessible Web site gives research professionals working in a variety of occupations an invaluable tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades.
14   Link   Scientific Electronic Library Online
Provides access to a collection of Brazilian journals in science and medicine, as well as links to individual articles and reports.
15   Link   DOAJ:Political Science
Journals listed in the Directory of Open Access Journals that pertain specifically to the field of political science
16   Link   Directory of Open Access Journals (DOAJ)
This service lists free, full text, quality controlled scientific and scholarly journals which "use a funding model that does not charge readers or their institutions for access." Some journals may require user registration. Aims to cover all subjects and languages, with over 500 journals currently listed.
17   Link   New York Journal of Mathematics
18   Link   Journal of Artificial Intelligence Research
19   Link   Ecology and Society
20   Link   Economics Bulletin
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