Textbooks
Videos
Images
Low-cost digital textbooks that can be personalized to meet each instructor's needs
Mostly peer-reviewed modules and collections that can be used separately or organized into textbooks
List of online mathematics textbooks compiled by faculty at Georgia Institute of Technology
A large collection of peer-reviewed textbooks from the Center for Open Education at the University of Minnesota
JSTOR now offers more than 3,000 Open Access titles at no cost to libraries or users. Here are the top five for 2018:
Videos
Images
Music
Audiobooks