Open Educational Resources

Collaboration of several organizations. Provides links to open textbooks (some free, some low-cost), in a variety of subject areas. Content and accessibility reviews available.

Offers low cost textbooks that can be customized by the instructor.

Free, open-source, peer reviewed textbooks.

A searchable catalog of open textbooks from a variety of sources. Includes reviews.

An open-content textbooks collection that anyone can edit.