Commonwealth of Learning
Virtual University for Small States of the Commonwealth (VUSSC)
MIT Open Courseware
Open Courseware Consortium
Openstax CNX
Guide to Online Schools
OpenLearn
OpenLearnWare
OER Textbooks (OER Commons)
OER Textbooks (Collegeopentextbooks)
Open Yale Courses
Middle East Technical University Open Courseware
Online Courseware (Khan Academy)
Project Gutenberg
Wiki Books