Here below is a list of the most important open textbook providers and some other repositories of open access educational content as well as content-rich websites curated by librarians and former educators. Although most of the resources target university students, some are geared toward K-12 students while others may benefit all lifelong learners.
- The Open Course Library (OCL) is a Washington-based initiative that has made available courses for free as an alternative to the costly traditional textbooks in the US. They have published on the website links to open access resources - open textbooks, courses and other learning materials created and peer-reviewed by academics, and sponsored by foundations.
