Textbooks (exclusively)OpenStax TextbooksAmerican Institute of Mathematics Approved Open TextbooksCollege Open Textbooks2012 Book ArchiveLearning Objects and TextbooksOER CommonsBC Campus (open textbooks and more)
OpenStax/Connexions Learning ObjectsContent Without Borders
NJVID Digital Video Repository (New Jersey's video repository)National Science Foundation (NSF) MultimediaGalleryThe Orange Grove (Florida State's repository portal)Kahn AcademyMERLOT II OpenCulture.com (Free cultural and educational media resources)SCRATCH (MIT's educational repository)Open Access Theses and DissertationsPhET: interactive simulations for science and mathPrimarily VideoAcademic Earth
Primarily Video