A web-based repository of educational material that is free, open, and peer reviewed.

OER Commons was developed to serve educators in discovering, creating, and collaborating around the use, evaluation, and improvement of open educational resources.

View and share free educational material in small modules that can be organized as courses, books, reports or other academic assignments.

Amodular repository of open educational resources. Faculty at Saylor compile open educational material from across the web into courses that are modeled after those taught in universities.

The Open Textbook Library provides a growing catalog of free, peer-reviewed, and openly-licensed textbooks.

Textbooks created by a British Columbia OER initiative

Open Educational Resources from Commonwealth universities and educational institutions

Overseen by influential OER activist David Wiley, Lumen's Candela Learning catalog offers links to its own content as well as the content developed by institutions it has worked with on OER initiatives, such as Tidewater Community College and Washington State Community and Technical Colleges. The content isn't technically downloaded as a file; it's made available in HTML format, which can be accessed through a school's learning management system.

OpenStax is a nonprofit based at Rice University, and its mission is to improve student access to education.

LearningEdge is a collection of teaching case studies and simulations developed by MIT Sloan faculty and students.

This collection includes 85 mini-cases and 5 major cases. See additional information on the website for usage information.

These open case studies were created by faculty and students at the University of British Columbia. While many of these case studies focus on sustainability, they feature a broad range of topics across disciplines.

Oikos provides peer-reviewed, Creative Commons licensed case studies on sustainability, management, entrepreneurship, and finance.