The LibreText project consists of 13 pseudo-independently operating and interconnected libraries that host close to 130,000 pages of content in specific fields with a past emphasis on science, technology, engineering, and mathematics fields, but recently expanding into other fields.
Multimedia Educational Resource for Learning and Online Teaching is a curated collection of free and open online teaching, learning, and faculty development services contributed to and used by an international education community.
HathiTrust Digital Library is a collaborative repository of digital content from research libraries including open access content digitized via Google Books and the Internet Archive digitization initiatives, as well as content digitized locally by libraries.
Free public access to primary resource collections maintained by more than 300 contributing institutions including libraries, special collections, archives, historical societies, and museums throughout California.
BioInteractive resources primarily focus on core concepts and processes in biology, in addition to interdisciplinary resources with connections to biology in earth and environmental science, chemistry, and math and statistics.