AcademicJournals
Over 100 academic open access journals, many from developing countries
AGORA: Access to Global Online Research in Agriculture
Free or low cost access to over 15,000 journals and 50,000 books for developing countries
agrirXiv (CABI)
Open access to millions of agriculture-related preprints
AJOL: African Journals Online (International Network for the Availability of Scientific Publications – INASP)
Access to over 500 African scientific journals; no free full text, but with document delivery service
AMEDEO: The Medical Literature Guide
Current awareness service + index of medical articles; free abstracts
arXiv (Cornell University)
Open access to millions of physics and other sciences preprints
ASIAJOL: Asia Journals Online
Portal to scholarly journals published in Bangladesh, Nepal, The Philippines, Vietnam, Sri Lanka and Indonesia
ASM Journals
Access to 18 American Society for Microbiology journals; free for all after 4 months
BASE: Bielefeld Academic Search Engine
Open access repositories harvester: hundreds of millions of documents from over 9,000 repositories
Berkeley Electronic Press
“bepress: the new standard in scholarly publisher”
Bioline International (Brazil)
Over 50 open access journals from various developing countries
BioMed Central: BMC Journals
Over 300 digital-only open access journals
biorXiv (Cold Spring Harbor Laboratory)
Open access to millions of life sciences preprints
CAIRN: Chercher, Repérer, Avancer
500 revues de sciences humaines et sociales
chemrXiv (various societies)
Open access to millions of chemistry preprints
COBRA: Collection of Biostatistics Research Archive (bepress)
Combined electronic resource of (mostly American) institutions
DDB: Deutsche Digitale Bibliothek
DOAB: Directory of Open Access Books (OAPEN Foundation)
Some 44,000 open access books
DOAJ: Directory of Open Access Journals (Lund University Libraries)
Portal with some 17,000 bona fide open access journals
DPLA: Digital Public Library of America (Lund University Libraries)
A wealth of knowledge from libraries, archives, and museums: over 44,000,000 items
Elektronische Zeitschriftenbibliothek (Universitätsbibliothek Regensburg)
Links to electronic journal editions
eprints.org
Self archiving and open archives; OAI compliant, over 250 archives, over 500,000 documents
Europe PMC
European alternative to open access repository PubMed Central
Europeana
Europe’s Galleries, Libraries, Archives and Museums; over 60,000,000 items from 34 countries
Free Medical Journals (Geneva Foundation for Medical Education and Research)
Links to electronic journal editions
Free Medical Journals Site (AmedeoGroup)
Over 5,000 free journals; with current awareness service
FreeFullPDF.com
Over 80 million free scientific articles
GMS: German Medical Science (Germany)
Links to open access German medical articles
GreyNet: Grey Literature Network Service
Search ‘grey’ literature
HighWire Press (Stanford University Library)
Over 4,000 journals, partially free
HINARI: Health Internetwork Access to Research Initiative
Free or low cost access to over 21,000 journals and over 69,000 e-books for developing countries
HORIZON: Pleins textes (IRD, France)
Open access to IRD (formerly: ORSTOM) documents
INTECH
Open access publisher of over 5,400 scientific e-books
IRIS: Institutional Repository for Information Sharing (WHO)
J-STAGE (Japanese Science and Technology Information Aggregator, Electronic)
Links to over 3,000 Japanese electronic journals
JSTOR Project
Redefining access to scholarly literature
medrXiv (Colde Spring Harbor Laboratory et al.)
Open access to millions of health sciences preprints
MSF Field Research (Médecins Sans Frontières)
Open access repository of MSF members publications”
NARCIS (Netherlands)
Digital Academic Repositories – Digital library system for universities
NISC: National Inquiry Services Centre (South Africa)
African databases and journals
OAIster (OCLC / WorldCat)
Over 50,000,000 items from over 2,000 digital academic open archives
OARE: Access to Research in the Environment
Free or low cost access to over 6,000 journals and e-books for developing countries
OpenAIRE: Open Access Infrastructure for European Research (EU)
Over 20,000,000 items from over 2,700 repositories. Follow up project to Driver
OpenDOAR
Directory of over 5,600 Open Access Repositories
Oxfam Publications
Over 4,000 resources, mostly on development issues
OTA: Oxford Text Archive
Over 2,700 resources, mostly arts and humanities
ParaCite: Eprints Eprints.org at Southampton serving Open Archives
PLOS: Public Library of Science
Making scientific literature freely accessible to the public – 8 open access journals
Project MUSE (various American University Presses)
Scholarly journals online
PubMed Central (NCBI)
Over 8,000 open access journals (often with embargoes)
PubMed Central Europe
European mirror site of PubMed Central
Répertoire des journaux électroniques francophones en médecine-sciences (CISMEF)
Links to French periodicals (mostly not open access)
ROAR
Registry of over 4,700 Open Access Repositories
SCIELO: Scientific Electronic Library Online (BIREME)
Portal with over 1,800 Latin American open access journals, over 750,000 articles
ScienceOpen.com
Research+publishing network
SSRN: Social Science Research Network
Access to over 950,000 papers
TMCA: TropMed Central Antwerp (ITM)
Open access repository of the Antwerp Institute of Tropical Medicine
Zenodo
Shared research in Europe