(27 October 2018) Retraction Watch now has a unified database of retracted papers. JURN has the announcement. What you need to know.
(28 March 2016) JURN’s GRAFT search tool has updated. Now searching across 4,644 repositories, fulltext and records alike, using a Google Custom Search, GRAFT uses a unique source list of URLs that has been thoroughly de-duplicated, cleaned and tested for viability. The announcement is here.