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Select Publishers of Alternative Textbooks (Open Educational Resources)
Select Sources of Free Monographs
University presses and publishers from different countries have made their scholarly monographs in Humanities and Social Sciences freely downloadable through the OAPEN Library.
MIT Press Open
The MIT Press provides free downloads of monographs on a wide range of subjects.
National Academies Press (NAP)
Established by the National Academy of Sciences, NAP publishes on a wide array of topics in science, engineering, and medicine.
University Press of Kentucky (UPK) Books
More than 1,000 titles published by UPK are freely accessible to the faculty and students of the University of Kentucky via UKnowledge.
UC Press E-Books Collection, 1982-2004
Hundreds of books published by the University of California Press are freely accessible through this portal.
OpenEdition features open access books in the humanities and social sciences published in different European languages.
SciELO Livros publishes online academic books written in Spanish and Portuguese.
Supported by the Latin American Council of Social Sciences, CLACSO Libros provides free access to academic books from Latin American countries and other continents.
HathiTrust Digital Library
Thousands of out-of-copyright books digitized by academic libraries are available via HathiTrust.
Requires linkblue login at the HathiTrust site.
Project Gutenberg includes literary and other intellectual works in many languages.
unglue.it: Free Books
This page from unglue.it aggregates books that are distributed with an open license or are in the public domain.
Indexes and Repositories of Free Educational Materials
Operating out of Rice University, this repository carries both books and learning objects that are freely accessible online.
COOL4ed: Find FREE and OPEN eTextbooks
People can use this tool to find free and open textbooks from different sources. They can also enter the ISBN of a book to find related free textbooks.
Open Oregon: Educational Resources
This list shows what Oregon community college instructors have used to replace commercial textbooks. Those resources might be suitable for similar courses at other institutions.
Supported by Colorado State University, the WAC Clearinghouse enables "scholarly exchange about communication across the disciplines."
This repository holds free and open learning materials for "job-driven workforce development." The materials were developed by community colleges across the US.
Maintained by Fox Valley Technical College, this portal provides access to learning objects in the fields of health, science, mathematics, technology, and general education.
College Open Textbooks
This initiative aims to promote the adoption of open textbooks among community colleges and for the first two years (lower division) of universities.
Powered by The Open University, this site divides thousands of free online learning resources into eight broad categories.
Open Learning Initiative Independent Learner Courses
The Open Learning Initiative provides free learning materials about languages and STEM subjects.
Maintained by Berkeley Electronic Press, this resource aggregates free textbooks and educational materials made available by higher education institutions.
2012 Book Archive
This is an archive of openly licensed entry-level college textbooks.
This site indexes a variety of cultural and educational materials, including textbooks, eBooks, audio books, and movies.
The Orange Grove
As Florida's repository of open educational resources, it holds openly licensed materials for higher education, vocational education, and continuing education.
The Public Library of Science (PLOS) has curated collections of peer-reviewed journal articles on a variety of topics for research and educational purposes.
CORE is a free service that facilitates searches for and access to millions of open access research papers.
BASE (Bielefeld Academic Search Engine)
Operated by Bielefeld University Library in Germany, BASE indexes academic resources that are freely accessible online.
This is a multidisciplinary index of open access journal articles that can be reused for research and educational purposes.