In English Language Books
Arxiv: database of Physics
AGRIS: Agricultural Database
Analytical Science Digital Library (ASDL)
Anthropological Index Online (Bibliographical database)
Arnetminer (Online service used to index and search academic social networks)
Astrophysics Data System (Astrophysics, Geophysics, Physics)
BASE: Bielefeld Academic Search Engine (Multidisciplinary)
Bioinformatic Harvester
ChemXSeer: database of Chemistry
CHBD: Circumpolar Health Bibliographic Database (Medicine)
CiteSeerX (Science)
CogPrints: Cognitive Sciences Eprint Archives
CERN Document Server
EconBiz
ERIC: Educational Resource Information Center
GENESIS (Women’s history, Feminism)
SciTech Connect: Department of Energy Scientific and Technical Information
Intute (Social sciences and Humanities)
Mendeley (Multidisciplinary)
eSocialscience (Social Sciences)
OAIster (Multidisciplinary)
OpenGray (Multidisciplinary)
PhilPapers
POPLINE (Population,Family Planning,Reproductive Health)
PubChem (Chemistry)
PubPsych (Psychology)
RePEc: Research Papers in Economics
SafetyLit (Injury prevention literature)
gov (Physical sciences)
SSRN: Social Science Research Network
SPIRES-HEP
WorldWideScience
