OpenCoursewareSearch (Search engine for open course content. No longer current but contains list of 10 Universities open content)
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.
MIT Open Courseware
Open Learning Initiative (Carnegie Mellon)
Connexions (educational or instructional content by Rice University US)
Learning Space (UK Open University) (refer to terms)
p2pu (open education project, learner driven content)
iUniv (audiovisual open courseware content)
WikiEducator: Exemplary Collection of Open eLearning Content Repositories (collection of links to various open content or flexible content repositories: subject to change as per usual Wikipedida practices)
NEN Teaching and educational resources - most of them are cost free. They are categorised by year groups and discipline
10 Best OpenCourseWares Sites by Mashable
PHT Interactive Simulations PhET provides fun, free, interactive, research-based science and mathematics simulations. We extensively test and evaluate each simulation to ensure educational effectiveness. These tests include student interviews and observation of simulation use in classrooms.