While the Open Access Signalling project is concentrating on building and improving Wikisource- and Wikidata-based workflows around the signalling of the openness of references cited on Wikipedia, a number of discussions have sprung up independently as to how such signalling might look like at the Wikipedia end:
In the meantime, all references that were cited via their PubMed Central ID on the English Wikipedia by the end of last year (as per this dataset) have been imported as items in Wikidata (example).
Recent uploads: A marine snail in 3D, insufficiently labeled sausages, testing rhythm perception in birds
The following represents a selection of the files that have been uploaded this month from open-access sources. Most of these came from PubMed Central through the Open Access Media Importer — whose uploads now total over 21,900. If you can think of wiki pages where these files (or other files from the same source articles) could be useful, please put them in there or let us know.