Open Textbook Library Catalog, Open textbooks are textbooks that have been funded, published, and licensed to be freely uses, adapted, and distributed.
OpenStax, Peer-reviewed, openly licensed. 100% free.
OER Commons Open Textbooks, OER Common is a public digital library of open educational resources. Explore, create, and collaborate with educators around the world to improve curriculum.
BCOpen Campus, provide openly licensed textbook.
MERLOT Open Textbook, the merlot system provides access to curated online learning and support materials and content creation tools, led by an international community of educators, learners and researchers.
Chem Collective, The ChemCollective is a collection of virtual labs, scenario-based learning activities, tutorials, and concept tests. Teachers can use our content for pre-labs, for alternatives to textbook homework, and for in-class activities for individuals or teams. Students can review and learn chemistry concepts using our virtual labs, simulations, and tutorials. The ChemCollective is organized by a group of faculty and staff at Carnegie Mellon who are interested in using, assessing, and creating engaging online activities for chemistry education.
Directory of Open Access Books. Directory of Open Access Books is a joint service of OAPEN, OpenEdition, CNRS and Aix-Marseille Université, provided by DOAB Foundation.
National Science Digital Library, The National Science Digital Library provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines—both formal and informal, institutional and individual, in local, state, national, and international educational settings.
American Institute of Mathematics Open Textbook Initiative ,The American Institute of Mathematics (AIM) seeks to encourage the adoption of open source and open access mathematics textbooks.
BCcampus Opened ,An initiative in British Columbia, the library is strong in general education courses but also includes options for a number of skills and trades. Faculty reviews and ancillary resources are available for some textbooks.
The Center for Computer-Assisted Legal Instruction (CALI) ,Provides open and free casebooks on a range of legal topics relevant to first-year students.
LibreTexts ,“The LibreTexts mission is to unite students, faculty and scholars in a cooperative effort to develop an easy-to-use online platform for the construction, customization, and dissemination of open educational resources (OER) to reduce the burdens of unreasonable textbook costs to our students and society.”
OAPEN ,Online library and publication platform mainly in the area of humanities and social sciences.
Open Book Publishers ,“At Open Book Publishers we are changing the nature of the traditional academic book. Our books are published in hardback, paperback and ebook editions, but we also publish free online editions of every title in PDF, HTML and XML formats that can be read via our website, downloaded, reused or embedded anywhere.”
Open Research Library ,“The Open Research Library (ORL) is planned to include all Open Access book content worldwide on one platform for user-friendly discovery, offering a seamless experience navigating more than 20,000 Open Access books.”
Open SUNY Textbooks ,“Milne Library Publishing at SUNY Geneseo manages and maintains Milne Open Textbooks, a catalog of open textbooks authored and peer-reviewed by SUNY faculty and staff.“
PDXOpen ,An open access textbook publishing initiative to support Portland State faculty developing open access textbooks. The textbooks are freely available via PSU's institutional repository, PDXScholar.
Project Gutenberg ,Most books in Project Gutenberg are in the public domain so do not have copyright restrictions.