Open Textbook and OER Collections
- Open Textbook Library
- OER Commons
- Mason OER Metafinder
- OpenStax – included in Open Textbook Library, but a well known source of open textbooks for high enrollment courses, funded by Hewlett, Gates and other foundations.
- MERLOT
Collections from OER initiatives in states or institutions
- BC Campus OpenEd – from British Columbia
- California Open Online Library for Education – uses MERLOT
- Gallileo: Open Learning Materials – from Affordable Learning Georgia
- Grand Valley State University
- Michigan Colleges Online hub
- Minnesota OER Commons
- OhioLINK Open course content
- Open Michigan – from University of Michigan
- Open Oregon Educational Resources
- Open SUNY Textbooks – from the state of New York
- Portland State University