A new tool for finding open-access articles
Unpaywall is a Chrome browser extension that locates legal and free versions of paywalled or fee-to-view articles. It searches a variety of data sources including PubMed Central, the DOAJ, Crossref,DataCite, Google Scholar, and BASE and provides a PDF of requested articles around 65-85% of the time. This extension was developed by Impactstory and funded by the National Science Foundation and the Alfred P. Sloan Foundation. If you are having a difficulty time locating open-access information, this could be a great tool for you.
The Chronicle of Higher Education provides a detailed overview of this extension and its potential impact. /al