Check out the "unfiltered" list of with more than 140 sites with open educational resources at the bottom of this page.

Khan Academy is a non-profit educational organization created in 2006 by educator Salman "Sal" Khan with the aim of providing a "free, world-class education for anyone, anywhere". The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world.

Khan Academy offers its platform in seven languages: English (www), Spanish (es), Portuguese (pt), French (fr), Turkish (tr), Norwegian (nb), and Hindi (hi).

License: Except where otherwise noted, content is licensed under a Creative Commons (BY-NC-SA) 3.0 license.
Website: Khan Academy

StoryWeaver is an open source platform by Pratham Books for multilingual children’s stories. It addresses all the issues around the lack of content by using an open access framework and technology as force multipliers combined with a platform that supports translation and re-mixing av stories.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 4.0 Licence International (CC-BY-4.0)
Website: https://storyweaver.org.in/

The CK-12 Foundation is a California-based non-profit organization whose stated mission is to reduce the cost of, and increase access to, K-12 education in the United States and worldwide. CK-12 provides free and fully customizable K-12 open educational resources aligned to state curriculum standards and tailored to meet student and teacher needs. The foundation's tools are used by 38,000 schools in the US, and additional international schools.

License: Except where otherwise noted, content is licensed under a Creative Commons (BY-NC-SA) 3.0 license.
Website: CK-12.org

MIT OpenCourseWare (MIT OCW) is an initiative of the Massachusetts Institute of Technology (MIT) to put all of the educational materials from its undergraduate- and graduate-level courses online, freely and openly available to anyone, anywhere. MIT OpenCourseWare is a large-scale, web-based publication of MIT course materials. The project was announced on April 4, 2001 and uses Creative Commons Attribution-Noncommercial-Share Alike license.

License: Except where otherwise noted, content is licensed under a Creative Commons (BY-NC-SA) 4.0 license.
Website: MIT OpenCourseWare

OpenStax CNX was Founded as Connexions in 1999 by Richard Baraniuk. OpenStax CNX is based on the philosophy that scholarly and educational content can and should be shared, re-used and recombined, interconnected and continually enriched. As such, it was one of the first Open Educational Resources (OER) initiatives along with projects such as MIT OpenCourseWare and the Public Library of Science. The materials in Connexions are available under a CC-BY Creative Commons license

License: Except where otherwise noted, content is licensed under a Creative Commons (CC BY) 4.0 International License.
Website: OpenStax

OER Commons, created by the Institute for the Study of Knowledge Management in Education, was developed to serve curriculum experts and educators in discovering open educational resources (OER) and collaborating around the use, evaluation, and improvement of those materials.[1] Resources on the site can be searched and filtered using an expanded set of descriptive data, including conditions of use. Teachers, students, and others enrich this "metadata" when they tag, rate, and review materials, and share what works for them.

License: Except where otherwise noted, content is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.
Website: OER Commons

edX is a massive open online course (MOOC) provider. It hosts online university-level courses in a wide range of disciplines to a worldwide student body, including some courses at no charge. It also conducts research into learning based on how people use its platform. EdX differs from other MOOC providers, such as Coursera and Udacity, in that it is a nonprofit organization and runs on open-source software.

License: We aim to make much of the edX course content available under more open license terms that will help create a vibrant ecosystem of contributors and further edX's goal of making education accessible and affordable to the world. Certain reference documents, digital textbooks, articles and other information on the Site are used with the permission of third parties, and use of that information is subject to certain rules and conditions, which will be posted along with the information.
Website: edX.org

The mission of the Saylor foundation is to make education freely available to all. On its website, the foundation offers 317 free, college-level courses, which are selected as typical courses in high enrollment majors at traditional U.S. colleges. The foundation's course catalog is designed to be as open as possible, with all content accessible without needing to register or log in to the website.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 3.0.
Website: Saylor.org

The Open Course Library(OCL) is a collection of shareable course materials, including syllabi, course activities, readings, and assessments designed by teams of college faculty, instructional designers, librarians, and other experts. Some of our materials (also called open educational resources, or OER) are paired with low cost textbooks ($30 or less). Many of the courses can be taught at no cost to students.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 3.0
Website: The Open Course Library(OCL)

JHSPH open courceware offers open materials and images from more than a hundred courses developed by the faculty of JHSPH, the world’s foremost institution of public health education and research. OCW is an expression of our mission to provide learning opportunities and teaching resources to all who pursue improvement of health and prevention of disease around the world.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons BY-NC-SA.
Website: JHSPH open courceware

The Open Textbook Library provides a growing catalog of free, peer-reviewed, and openly-licensed textbooks.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 4.0 License.
Website: The Open Textbook Library

Boundless pBoundless provides a number of open course packages (47 course packages in Biology alone) in 22 discipline areas. Boundless also provides low-cost textbooks. Most of them are below $20.

License: Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0.
Website: Boundless.com

Open Yale Courses (OYC) provides lectures and other materials from selected Yale College courses to the public free of charge via the Internet. The courses span the full range of liberal arts disciplines, including humanities, social sciences, and physical and biological sciences.

License: Most of the lectures and course material within Open Yale Courses are licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license. Unless explicitly set forth in the applicable Credits section of a lecture, third-party content is not covered under the Creative Commons license.
Website: Open Yale

BC Campus The goal of the project was to make higher education more accessible by reducing student cost through the use of openly licensed textbooks. the project was asked to create a collection of open textbooks aligned with the top 40 highest-enrolled subjects in the region of British Columbia.

License: Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 4.0.
Website: BC Campus

The Norwegian Digital Learning Arena (Nasjonal digital læringsarena) is a joint enterprise operating on behalf of the county councils in Norway. Its aim is to develop and publish high quality, internet-based open educational resources (OER) in subjects taught at upper secondary school level and make these freely available. The joint production and purchase enterprise was initiated by 18 counties in 2007 when the responsibility for the acquisition of learning content was delegated from the state to the county level. All counties except Oslo are owners of NDLA, with Hordaland county as formal judicial unit.

License: NDLA use a variety of licenses, mainly Creative Commons. Some parts of the NDLA is Copyright.
Website: www.ndla.no

OpenTextbookStore Wikibooks
Storyweaver African Storybook
Academic Earth NDLA
African Health OER Network OER Commons
Alison Online Kennis
Aljazeera creative commons repository Open Chemistry (University of California Irvine)
Almae Matris Studiorum Campus Open Course Library
Archive’s library of Open Educational Resources Open Culture
Ariadne Open Digital Archive - ODA - HIOA
Banco de iten Open Education Consortium
Banco Internacional de Objetos Educacionais Open Education Database (OEDB)
BBC Learning Open Educational Resources (OER) Africa
BCCampus Open Textbooks * Open Educational Resources for Typography
Bergen Open Research Archive (BORA) Open Learning Initiative
BookBoon Open Text Book Library *
California Digital Library Open Universiteit
ChemCollective Open Yale Courses
Class Central OpenLearn
College Open Textbooks * OpenLearnWare
Computer Science Open Educational Resources OpenMichigan
Consortium for the Advancement of Undergraduate Statistics Education OpenStax (Connexions) *
Culturally Authentic Pictorial Lexicon OpenStax College *
Curriki Organic.Edunet Federation
Dashboard Equella Outreach and Technical Assistance Network
Desarrolla, Aprende y Reutiliza (DAR) panOpen
Digiref Pearson Copyleft
Digital Library for Earth System Education PHET Physics Education Technology
Discovery Education Portal das Escolas
Economics Network Online Learning and Teaching Materials Project Gutenberg - Free eBooks
Edu Fi Public Domain Review
Educar Chile Public Library of Science
Edumedia Share Recursos Educacionais Abertos Brasil
Eduteka Repositorio de Objetos Digitales y Aprendizaje - RODA
Everything Maths Restore
Federal Resources for Educational Excellence Royal Roads University Open Educational Resources
First World War Poetry Digital Archive Sankoré
Free Science Videos and Lectures Saylor.org *
FREIburger Multimedia Object Repository Skolresurser
Geoscience Data Repository Smithsonian
Global Learning Objects Brokering Exchange - GLOBE Spiral Physics
Gooru Stanford Encyclopedia of Philosophy
Harvard Open Collections Program Stanford on ITunesU
HBO Kennisbank Teach Astronomy
History Matters Temoa
Hum Box Textbook Revolution (Free Cultural Works) *
I2g Intergeo The Global Text Project *
I-Berry The Library of Congress
ITSON repositorio de objetos de aprendizaje The London Met Elearning Matrix
Jorum The Orange Grove (Higher Education)
Khan Academy The Orange Grove (Open Textbooks) *
Kursnavet The world lecture project
Lab Space TU Delft OCW
Learning Pod Tufts University
LeMill Ulusal Açik Ders Malzemeleri / Turkish National OER
Making of America UNITRACC
Manufacturing Pasts University of Cape Town
Matematica Multimidia University of Leicester OER Repository
Materialeplatformen VCILT
MathWorld VP Metodicky Portal
Merlot Webcast.Berkeley
MIT Open Courseware Wikiwijs
NARCIS - National Academic Research and Collaborations Information System Wisconsin Online Resource Center
NASA Wavelength (Higher Education) Wolfram Demonstrations Project
National Digital Learning Resources Network World History Sources
National Learning Network Xpert
National Science Digital Library (NSDL) Zunia

“Education is the most powerful weapon which you can use to change the world. - Nelson Mandela ”