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OpenEd Research Group: The Open Education Group is an interdisciplinary group of people based at Brigham Young University who are passionate about improving education and a stellar group of partners that are helping us get it done.
BC Campus Open Textbooks: BC Campus Open Textbooks offers over 150 textbooks across disciplines that are all openly licensed with Creative Commons licenses. They also offer a guide to authoring and adapting open textbooks.
Bookboon.com: Bookboon's free online textbooks for students are focused and to the point. They are all written by highly respected professors from top universities in the world and cover topics such as economics, statistics, IT, engineering, and natural science.
College Open Textbooks Collaborative: The College Open Textbooks Collaborative, a collection of twenty-nine educational non-profit and for-profit organizations, affiliated with more than 200 colleges, is focused on driving awareness and adoption of open textbooks to more than 2000 community and other two-year colleges. This includes providing training for instructors adopting open resources, peer reviews of open textbooks, and mentoring online professional networks that support for authors opening their resources, and other services
Community College Consortium for Open Educational Resources (CCCOER): includes more than 500 open textbooks in a variety of subjects.Curriki: a hub for free, open course materials. Find thousands of course materials in a variety of subjects and grade levels, including free courses and textbooks.
Flat World Knowledge: This is a college textbook publisher whose books are published under an open license. This allows professors to customize the books they order – edit, add to, mix-up, or use as-is. Students can access the books online for free or can pay for print-on-demand and audiobook versions.
Galileo: The repository is administered by Affordable Learning Georgia, an initiative of GALILEO and the University System of Georgia which aims to reduce the cost of textbooks to students and contribute to their retention, progression, and graduation.
Global textbook Project: An international initiative, Global Textbook Project seeks to provide access to free, quality textbooks to students in developing nations. The project is led by a team of university faculty members, whose global staff is creating a growing collection of open textbooks.
InTech Open Access Textbooks: InTechOpen is the world's largest Science, Technology, and Medicine Open Access book publisher. With a goal to provide free online access to research since 2004, InTechOpen has published 2,773 books and 45,530 scientific works by 96,019 international scientists.
National Academies Press: Most books published by the National Academies Press can be downloaded for free in PDF format. Just find the book you want, bypass the print price, and click the “Download Free PDF” button. This site requires that you provide a name and email address.
OER Commons: Materials range from pre-k to secondary. Along with other materials, textbooks are included.
Open Culture: has a collection of 150 free textbooks from Art History to Physics and Business
Open Learning Initiative - Carnegie Mellon University: You can access most OLI course materials at no cost to you and work at your own pace*. "Our learning platform gives you targeted feedback as you go, which helps you know if you are mastering a topic or if you need more practice."
OpenStax: OpenStax offers students free textbooks that meet scope and sequence requirements for most courses. These are peer-reviewed texts written by professional content developers
Open Textbook Library- University of Minnesota and partners: 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.
Project Gutenberg: is the place where you can download 33,000 free books! This is a great resource for Literature classes and books for young children.
SpringerOpen: "The growing demand for open access publishing has led Springer to expand our open access program to fully open access books as a further addition to our already established SpringerOpen journal portfolio. Authors in all disciplines now have the opportunity to publish open access books, including complete monographs, edited volumes, proceedings and SpringerBriefs."
SUNY Open Textbooks: "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 publishes high-quality, cost-effective course resources by engaging faculty as authors and peer-reviewers, and libraries as publishing service and infrastructure." -- From the SUNY Open Textbooks website.
Teaching Commons: The Teaching Commons showcases high-quality open educational resources from leading colleges and universities and makes them available to educators and students around the world. Curated by librarians and their institutions and hosted by bepress, the Teaching Commons includes open-access textbooks, course materials, lesson plans, multimedia, lectures, k-12 materials, and more
Textbook Revolution: Textbook Revolution is a student-run site dedicated to increasing the use of free educational materials by teachers and professors.. On this site you'll find links and reviews of textbooks and select educational resources. Some of the books are PDF files, others are viewable online as e-books, or some are simply web sites containing course or multimedia content.
Wikibooks: is a Wikimedia community for creating a free library of educational books that anyone can edit. Rather than being subject to expensive static books, Wikibooks readily encourages copying, modifying, reusing, and free distribution of its books.
Writing Commons: CC-BY-NC-ND.
Free Online Databases: An online guide featuring hundreds of free online databases. While not everything in this guide qualifies as an OER, much of it will.Jorum: The UK's largest repository for discovering and sharing Open Educational Resources for higher and further education and the Skills sector. Currently contains over 16,000 resources.
Jurn: Custom Google Search to search millions of free academic articles, chapters and theses from a variety of publishers.
MERLOT: MERLOT is a curated collection of over 65,000 free and open online teaching resources from the California State University System.
OER Commons: A massive collection of OER divided by subject and grade levels. Includes over 40,500 college level resources.
OER Knowledge Cloud: Not so much a collection as a massive OER search engine. All journal articles, reports, books, and other items are fully searchable and either pulled from the source or linked to it.
Open Access Button: This search requires you to already have a citation, title, DOI, or URL before searching and scours the Internet looking for legal, open access versions of your requested article.
Open Education Consortium: Includes open textbooks in 24 subjects as well as open courses.
The Orange Grove: Florida's open educational resource repository containing open collections, including courses and textbooks, as well as links to institutional repositories within the state.
Temoa: An OER portal from the Tecnológico de Monterrey System that searches over 500,000 resources from a variety of sources including MIT, Cornell University, Princeton, and other universities worldwide.
Tufts University Open Academic Resources: High quality resources from all Tuft University schools, including research centers and hospitals.
References
Pitt, R. (2015). Mainstreaming open textbooks: Educator perspectives on the impact of OpenStax college open textbooks. The International Review of Research in Open and Distributed Learning, 16(4).
Jung, E., Bauer, C., & Heaps, A. (2017). Higher education faculty perceptions of open textbook adoption. The International Review of Research in Open and Distributed Learning, 18(4).
de los Arcos, B., Farrow, R., Pitt, R., Weller, M., & McAndrew, P. (2016). Personalising learning through adaptation: Evidence from a global survey of K-12 teachers’ perceptions of their use of open educational resources. Journal of Online Learning Research, 2(1), 23-40
Bliss, T. J., Hilton III, J., Wiley, D., & Thanos, K. (2013). The cost and quality of online open textbooks: Perceptions of community college faculty and students. First Monday, 18(1).
Hilton III, J., Bliss, T. J., Robinson, T. J., & Wiley, D. A. (2013). An OER COUP: College teacher and student perceptions of open educational resources.
Kimmons, R. (2015). OER quality and adaptation in K-12: Comparing teacher evaluations of copyright-restricted, open, and open/adapted textbooks. The International Review of Research in Open and Distributed Learning, 16(5).