Khan Academy: “Learn almost anything for free.” Check out their TED Talk for more information.

Wikiverstity: “Wikiversity is a Wikimedia Foundation project devoted to learning resourceslearning projects, and research for use in alllevels, types, and styles of education from pre-school to university, including professional training and informal learning. We invite teachersstudents, and researchers to join us in creating open educational resources and collaborative learning communities.”

Memrise: Combines Science, Fun, and Community to learn real skills online. Check out their founder on BBC Breakfast.

Einztein brings the power of social networking to higher education and lifelong learners by enabling anyone to create an online learning community for resource sharing, collaboration and discussion. Teachers can easily turn courses into social learning experiences. Students can form online study groups to research and learn together. Institutions can engage learners around their educational content.”