We are committed to making the best education in the world freely available to any person who seeks it. We envision people throughout the world, in both developed and developing countries, using our platform to get access to world-leading education that has so far been available...

Wikibooks is a Wikimedia community for creating a free library of educational textbooks that anyone can edit.

Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal learning.

Online university-level technical courses. We believe university-level education can be both high quality and low cost. Using the economics of the Internet, we've connected some of the greatest teachers to hundreds of thousands of students all over the world.

Open Yale Courses (OYC) provides free and open access to a selection of introductory courses taught by distinguished teachers and scholars at Yale University.

The OpenCourseWare Consortium is a collaboration of higher education institutions and associated organizations from around the world creating a broad and deep body of open educational content using a shared model.

Academic Earth offers free access to video courses and academic lectures from leading colleges and universities.

University of the People is the world’s first tuition-free, non-profit, online academic institution dedicated to opening access to higher education globally for all qualified individuals, despite financial, geographic or societal constraints.

Pocket Scholar is a science-learning platform centered around breaking down complicated science topics into smaller chunks that makes them easier to understand. We believe in a future where everyone has access to high quality, college level content that they actually can...

Community-driven catalog of learning resources. Links to resources are organized by topics (broad to specific) and rated/reviewed by users so you see which ones are the best. It's free and open for everyone.

Take free Harvard online courses through Harvard Extension School's Open Learning Initiative. Course videos feature Harvard faculty.

Engineer4Free is a tutorial site where anyone can learn university level engineering for free. Engineer4Free has made hundreds of YouTube tutorials and organized them into several courses ranging from Calculus to Project Management to Structural Analysis.