| Source
|
| 2012 Book Archive
|
| Affordable Learning Georgia
|
| Bay College OER
|
| BCcampus Open Textbooks
|
| Bookboon
|
| California Open Online Library for Education (COOL4ED)
|
| Center for Open Educational Resources and Language Learning
|
| CK-12
|
| Community College Consortium
|
| Directory of Open Access Books
|
| FreeTechBooks
|
| Galileo
|
| InTech
|
| Lake Tahoe Community College CCC OER List
|
| LibreTexts
|
| Literature in Context: An Open Anthology of Literature in English, 1400-1925
|
| Mason OER Metafinder
|
| Michigan Open Textbook Project (3-12)
|
| National Academies Press
|
| NCBI (science and health)
|
| OASIS
|
| OER Commons
|
| Open Oregon
|
| OpenStax
|
| OpenTextBookStore
|
| Open Textbook Library
|
| San Bernardino Valley College
|
| Saylor Academy
|
| Siyavula (4-12)
|
| University of Hawaii Pressbooks
|
| University of South Florida Scholar Commons
|
| Wikibooks
|