You can search for a particular type of OER via the choices on the side menu or use the search tools below.
Even though a search tool, database or collection is not listed here it may still contain OERs. In the resource you are searching look for:
Library Search has an option to limit your results to open access.
You can also limit to particular Content types, such as book, video, images, audio and more.
Search these Open Educational Resource (OER) collections for different types of OERs.
Google advanced search allows you to limit to content published under an open license: