OER repositories (which store OER) and referatories (which link out to OER on various platforms) improve the findability of OER, whether they're created by a publisher listed below, produced by an individual faculty member, or consist of public content.
OER Metafinder performs a simultaneous search across 23 different sources of open educational materials. Because it is a real-time, federated search, it can take a bit longer than searches of pre-indexed, curated content. Additional results will continue to trickle in as the search continues running and you begin examining your 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 114 different sources and contains 440,452 records.
OASIS is being developed at SUNY Geneseo's Milne Library.