Most OER organizations or collaborations have a database or central list of resources that faculty have added.
Additionally, many disciplines have their own OER websites.
The list here is not comprehensive but can be used as a starting point for faculty doing interdisciplinary work or work in any discipline. Remember that not all of the learning materials in these repositories and sources are OER for modifying but most of the content is freely available under Fair Use and/or with attribution.
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.
Users can start a search if they know what they’re looking for, or they can view the variety of OER source types available to them—textbooks, courses, interactive simulations, audiobooks, and learning objects are just a few of the tools one can look for. Users can also refine their search by the source, license, and whether or not the resource has been reviewed. For those who need a text which has already been evaluated, this certainly helps.
OASIS is maintained by SUNY Geneseo's Milne Library.