Chronicle of Higher Education: “Open-access advocates have had several successes in the past few weeks. The Bill & Melinda Gates Foundation started its own open-access publishing platform, which the European Commission may replicate. And librarians attending the Association of College and Research Libraries conference in March were glad to hear that the Open Access Button, a tool that helps researchers gain free access to copies of articles, will be integrated into existing interlibrary-loan arrangements. Another initiative, called Unpaywall, is a simple browser extension, but its creators, Jason Priem and Heather Piwowar, say it could help alter the status quo of scholarly publishing…Like the Open Access Button, Unpaywall is open-source, nonprofit, and dedicated to improving access to scholarly research. The button, devised in 2013, has a searchable database that comes into play when a user hits a paywall. Unpaywall, by contrast, has focused on creating a browser extension. “We want to do just one thing really well: instantly deliver legal, open-access, full text as you browse,” says Mr. Priem, who also started the altmetrics site Impactstory with Ms. Piwowar. When an Unpaywall user lands on the page of a research article, the software scours thousands of institutional repositories, preprint servers, and websites like PubMed Central to see if an open-access copy of the article is available. If it is, users can click a small green tab on the side of the screen to view a PDF. we’re able to deliver an OA copy to users more than half the time,” says Mr. Priem…”