AllABCDEFGHIJKLMNOPQRSTUVWXYZ

A

• Access to Research
• Active Calculus
• Afric ArXiv
• AfricArXiv
• AgriXiv
• Aperio Press
• ArchivesDirect
• arXiv

B

• B!SON – Bibliometric and Semantic Open Access Recommender Network
• BibSonomy
• BioPortal
• BITSS

C

• Cermine
• CIÊNCIAVITAE
• CiteSeerX
• Coko – Collaborative Knowledge Foundation
• Copernicus
• CORE

D

• DataCite OAI-PMH Provider
• DataHub
• dblp computer science bibliography
• De Gruyter
• Direct to Open (D2O)
• DOI
• Dryad Digital Repository
• DSpace Direct
• DuraCloud
• DuraCloud Vault

E

• EarthArXiv
• ECSarXiv
• eLife
• Emerald Publishing
• engrXiv
• eScholarship – scholarly publishing and repository services
• Europe PMC

F

• F1000Research
• FAIRsharing
• Figshare
• FOSTER – Open Science
• FrenXiv

G

• Get Full Text Research (GetFTR)
• Glasstree
• GoodTables
• Google Scholar
• GROBID – PDF into structured XML/TEI

H

• HAL open archive (archives-ouvertes)
• Hindawi
• HykuDirect

I

• INA-Rxiv Papers
• ISIDORE

J

• JSTOR

L

• Language Science Press
• Libero
• Libero publishing suite
• LISSA

M

• MarXiv
• Mason OER Metafinder
• MEDLINE
• MindRxiv

N

• NutriXiv

O

• OARE
• OASIS (OER Search Tool)
• OER Commons
• Open Access Button
• Open Access Directory (OAD)
• Open Library of Humanities (OLH)
• Open Science Framework (OSF)
• OpenAlex
• OpenDOAR
• OpenEdition
• OpenEdition Books
• OpenStax College

P

• PaleorXiv
• PLOS
• PLOS ONE
• Pluto
• PrePostPrint, laboratory and research group
• PressBooks Book Writing
• PressbooksEDU
• Programming Historian
• Project Euclid
• Protocols.io
• PsyArXi
• PubFactory

R

• re3data
• REFRAME Books
• ResearcherID
• ROAR

S

• SCImago Journal & Country Rank
• Semantic Scholar
• Share
• Shareyourpaper
• shortDOI
• Silverchair
• SocArXiv
• SportRxiv
• SpringerOpen

T

• Thesis Commons
• TIB Open Publishing
• Toward an Open Monograph Ecosystem

U

• Ubiquity Press

V

• Verbalize.science

W

• Web of Science
• Wellcome Open Research
• WikiJournals
• WorldCat