MIT OpenCourseWare is a publication of virtually all MIT course content. Thousands of full courses are available.
Saylor is an open collection of college level courses developed by a team of experienced college professors to fulfill the same learning objectives as traditional college courses. Courses are licensed using Creative Commons.
Wikiversity is 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.
OER Learning Objects
OER Commons provides a single point of access through which educators and learners can search across collections to access over 30,000 items. These resources are publicly available for all to use principally through Creative Commons licensing.
MERLOT is a free and open online community of resources and collections of peer reviewed online learning materials.
Video, live music, audio, texts and much more. This is a true treasure trove of re-usable materials.
OpenStax are developed and peer-reviewed by educators to ensure they are readable, accurate, and meet the scope and sequence requirements of courses. Rice University.
Open SUNY Textbooks is an open access textbook publishing initiative that publishes high-quality, cost-effective course resources.