It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Openly Available Sources Integrated Search (OASIS) is a search tool that aims to make the discovery of open content easier. OASIS currently searches open content from 98 different sources and contains 368,234 records. Created by SUNY Geneseo's Milne Library.
The Mason OER Metafinder (MOM) is produced by George Mason University Libraries and is another OER search tool you can try. It searches all of the following repositories for OER licensed works:
American Memory Project (Library of Congress), AMSER – Applied Math and Science Education Repository, BC Campus:Open Ed, College Open Textbooks, Digital Public Library of America, Directory of Open Access Books (DOAB), HathiTrust – Full View Available, Merlot.Org, MIT OpenCourseware, OAOpen.org, OER Commons, OERs at Internet Archive, Open Textbook Library, OpenStax CNX, Project Gutenberg, & World Digital Library.