PNAS (Proceedings of the National Academy of Sciences of the United States of America) – one of the most cited multidisciplinary journals, which broadly covers biological, physical and social sciences – is available until 2nd July.
Now Publishers makes the IEEE (Institute of Electrical and Electronics Engineers) collection covering informatics, engineering, economics and business available free of charge until 30th June.
EDP Science offers their STM (Science, Technology, Medicine) collection for free until 31st August.
