A note of caution: This engine searches Open Access resources. Not all of the items you retrieve will be in the public domain or have a Creative Commons license. In other words, they will not be OER.
"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 57 different sources and contains 159,459 records."
"Seamless access to millions of open access research papers, enrich the collected data for text-mining and provide unique services to the research community."
