Open College Textbooks is a project of the COT Education Corporation, a registered 501(c)(3) corporation whose mission is to create and support programs that increase access to affordable lifelong learning for everyone.
OpenStax is a nonprofit educational initiative based at Rice University who publish high-quality, peer-reviewed, openly licensed college textbooks that are absolutely free online and low cost in print.
Open SUNY Textbooks is an open access textbook publishing initiative established by State University of New York libraries and supported by SUNY Innovative Instruction Technology Grants. This pilot initiative published high-quality, cost-effective course resources by engaging faculty as authors and peer-reviewers, and libraries as publishing service and infrastructure.
Open Textbook Library is a network of higher education institutions and systems are supporting the library and the adoption of open textbooks. It is hosted by the University of Minnesota Center for Open Education.