Multiple institutional sponsors, hosted by University of Minnesota - Twin Cities. "This library is a tool to help instructors find affordable, quality textbook solutions. All textbooks in this library are complete and openly licensed." UMKC is a member of the Open Textbook Network (OTN), which supports the Open Textbook Library, through MOBIUS.
While the College Open Textbook Collaborative focuses on providing textbooks for Community Colleges, many of the resources they have peer-reviewed would be usable for lower-division undergraduate coursework.
The DPLA is an all-digital library that aggregates metadata for millions of photographs, manuscripts, books, sounds, moving images, and more from libraries, archives, and museums around the United States. Material which is out of copyright or openly-licensed is available in full.
A free publication service by the Association of American Medical Colleges (AAMC) and the American Dental Education Association (ADEA) of peer-reviewed medical education materials. Licensed under Creative Commons open licenses.
"Through the initiative, faculty can receive a stipend up to $5,000 to develop or adopt an alternate to a traditional textbook. This process may involve using a range of resources across different media (articles, video, audio, websites) or the use of an existing open access textbook."
"This pilot initiative encourages instructors to use low-cost or free alternatives to expensive course materials; these can include open-access scholarly resources, Library-licensed and owned resources, and learning objects and texts that faculty create themselves. Awards are available of $1,000 each for instructors teaching courses with enrollments of fewer than two hundred students and of $2,500 each for instructors teaching courses with enrollments of more than two hundred students."
Emory Libraries and Information Technologies provides mini-grants of $1,000 for faculty to produce OERs, library resources, or other faculty-generated content to be used in lieu of a textbook in courses in the upcoming academic term.