"A curated collection of free and open online teaching, learning, and faculty development services contributed and used by an international education community."
Affiliation: California State University System

Curated collections of open educational resources from institutions around the world.
Affiliation: Institute for the Study of Knowledge Management in Education.

This award-winning learning object collection receives visits from over 1.5 million monthly users. Affiliation: Wisconsin's Technical Colleges

"These books have been reviewed by faculty from a variety of colleges and universities to assess their quality. These books can be downloaded for no cost, or printed at low cost. All textbooks are either used at multiple higher education institutions; or affiliated with an institution, scholarly society, or professional organization."
Affiliation: University of Minnesota. Supported by the Center for Open Education and the Open Textbook Network