A
- AARC
- AcademiaNet
- Academic Journals
- Active Calculus
- African Journals OnLine (AJOL)
- ALPSP
- Altmetric
- AmeliCA
- American Library Association
- Amnesia
- Anthro Encyclopedia
- Apache License
- Arc Humanities Press
- Arcadia
- Arcadia Fund
- ARLIS UK & Ireland
- Artstor
- ASAPbio
- Ask Open Science
- Atlantis Press
- AU Press
- AUPresses
- Australasian Open Access Strategy Group (AOASG)
B
C
D
E
F
G
H
I
- IATUL, In the Service of University Libraries
- Impactstory
- Institute of Museum and Library Services
- INTACT
- International Children’s Digital Library
- International Science Council (ISC)
- International Standard Audiovisual Number (ISAN)
- International Standard Book Number
- International Standard Musical Work Code (ISWC)
- International Standard Name Identifier (ISNI)
- International Standard Serial Number (ISSN)
L
M
N
O
- OA Academy
- OASPA
- OATD
- OER Commons
- OER Knowledge Cloud
- OER Logo
- OER World Map
- Open Access Belgium
- Open Access in Media Studies
- Open Access Network
- Open Access Scholarly Publishers Association
- Open Access Tracking Project (OATP)
- Open Archives Initiative
- Open Book Publishers
- Open Data Institute
- Open data Institute (ODI)
- Open Definition
- Open Education Consortium (OEC)
- Open Education Group, interdisciplinary research group
- Open Humanities Press
- Open Indiana
- Open Knowledge Foundation
- Open Knowledge International
- Open Knowledge Labs
- Open Michigan
- Open Oregon
- Open Pedagogy Notebook
- Open Professionals Education Network (OPEN)
- Open Repository
- Open Science Community (OSC) Maastricht
- Open Science Data Cloud
- Open Science MOOC
- Open Society Foundations
- Open Source Geospatial Foundation (OSGeo)
- Open SUNY Textbooks
- Open Syllabus
- Open Textbook Library
- Open Textbook Network (OTN)
- open-access.net
- Open-Heritage
- OpenAccess Sweden
- OpenAccess UNC
- OpenAccessOxford
- OpenAire
- OpenCitations
- OpenProceedings
- OpenRefine
- OpenStax College
- OpenTextBooksLibrary
- OpenUP Hub
- OPERAS
- Outbreak Science
P
- PACKED vzw
- PaleorXiv Papers
- Paperbuzz
- PaperHive
- Papers With Code
- PASTEUR4OA
- PeerJ, Journal of Life and Environmental Sciences
- Portico
- PrePostPrint, laboratory and research group
- Pressbooks.Directory
- Project Gutenberg
- Project MUSE, scholarly journals and books
- ProseMirror, toolkit for building rich-text editors
- PsyOA
- Public Library Association (PLA)
- PubMed Central
- Punctum Books
R
S
T
- TEI – Text Encoding Initiative
- Textshop Experiments
- The Centre for Postdigital Cultures (CPC)
- The EQUATOR Network
- The Fair Open Access Alliance
- The Idealis
- The International Standard Recording Code (ISRC)
- The Library Publishing Coalition (LPC)
- The Open Journals
- The Open Scholarship Initiative (OSI)
- The Programming Historian
- The Public Philosophy Journal
- The Scholarly Kitchen
- The Scientific Electronic Library Online – SciELO
- The Triangle SCI
- Transpose
- Tropy – Research Photo Manegement
- Tuwhera Open Access