MIT OpenCourseWare has got over 2100 courses in more than 10 top categories (with sub-categories) from over 30 departments. The categories include Business, Energy, Engineering, Health & Medicine, Humanities, Science, Society.
Visit

OER Africa Courseware provides a home for all African OER courseware. Over the years our focus has been on Agriculture, Foundation Skills, Health and Teacher
Visit

Johns Hopkins OpenCourseware offers a free, online course, “An Introduction to the US Food System: Perspectives from Public Health.
Visit