- Directory of Open Access - Open access scientific and scholarly journals that use a quality control system to guarantee the content
- Harvard University Library OCP - Online access to historical resources from Harvard's renowned libraries, archives, and museums
- JHSPHOpenCourseWare - The Johns Hopkins Bloomberg School of Public Health's OpenCourseWare project
- MERLOT - Multimedia Educational Resource for Learning and Online Teaching (Creative Commons)
- MIT's OpenCourseWare - A free and open educational resource for educators, students, and self-learners around the world
- OER Commons - A teaching and learning network of shared materials, from K-12 through college, from algebra to zoology, open to everyone
- OpenCourseWare Consortium - Universities working together to advance education and empower people worldwide
- OpenCourseWare Finder - Search through a collection of open educational materials
- Open Learning Initiative - A collection of openly available and free online courses and course materials that enact instruction for an entire course
- OpenLearn LearningSpace - Free and open educational resources for learners and educators around the world
- Open Source Education Foundation - Enhancing K-12 education using technologies and concepts of the Open Source and Free Software movement
- Open Source Initiative - A non-profit corporation formed to educate about and advocate for the benefits of open source
- Open Source Living - An archive of Open Source software, applications and references
- Notre Dame OpenCourseWare - Open access to the materials used in a variety of courses
- The Open Letter Project - An online collection of open historical letters, contemporary letters and users can write their own
- Tufts OpenCourseWare - Tufts' initial course offerings demonstrate the University's strength in the life sciences
- UCIrvine OpenCourseWare - University-level educational materials, including syllabi, lecture notes, assignments and exams
- Utah State OpenCourseWare - A collection of educational material used in USU's formal campus courses
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