- Association of College and Research Libraries (ACRL)
- Centre for Educational Research and Innovation (CERI - OECD)
- Commonwealth of Learning
- Community College Consortium for OER (CCCOER)
- Creative Commons
- Curriki
- Directory of Open Access Journals (DOAJ)
- Historically Black Colleges and Universities (HBCU) Affordable Learning Solutions
- Institute for the Study of Knowledge Management in Education (ISKME)
- International Council for Open and Distance Education (ICDE)
- Massachusetts Department of Higher Education - OER Initiative
- MERLOT
- MIT OpenCourseWare
- OER Africa
- OER Commons
- OER Digest
- OER Foundation
- OERu
- Open Education Conference
- Open Education Consortium
- Open Education Global
- Open Education Network
- Open Oregon Educational Resources
- Open Professionals Education Network (OPEN)
- Open Washington
- OpenCon
- OpenStax
- Oregon State University - OER
- Rebus Community
- Remixing Open Textbooks through an Equity Lens (ROTEL)
- Saylor Academy
- Sherpa Romeo
- Skills Commons
- SPARC
- UNESCO - OER
- Western Interstate Commission for Higher Education (WICHE)
- WikiEducator
- Wikimedia Foundation
Source of 5R activities: nsufl.libguides.com
