Described as "Google for OER" because they search across numerous popular OER repositories at once:
Your one-stop-shops for finding OER!
From the California State University, COOL4Ed offers numerous ways to learn about, search for, and locate appropriate OER for your courses (including etextbooks, supplemental materials, courses, eJournals, and articles).
You can even search by your current textbook's ISBN number to get a list of OER alternative titles! Just scroll down the page and look for this search box:
There are many different types of repositories that house Open Educational Resources, and this page is designed as a guide to these different collections. This is by no means an exhaustive list, but is a good sampling of the types of resources and collections of OERs that exist.
By focusing on your course learning objectives, you can decide the type of resources needed. For example, not every course will need an entire textbook to meet the course learning objectives.
What you can find here: