HEAL, Health Education Assets Library
A digital collection of freely available teaching materials.
MIT Open CourseWare – Health Sciences & Technology
This is a web-based repository of MIT course content.
NCBI Bookshelf
This is an online searchable collection of books and other materials from the National Center of Biotechnology Information (NCBI), focused on biology, medicine, and the sciences.
Open Michigan
Open Michigan does not limit its resources to textbooks; it provides links to images and videos, open courses, data collections, and software among other resources.
OpenRN
Ten open textbooks for nursing education. Click on the Nursing category at the link.