Below are resources for grey literature in the Health Sciences.

Australia

Medicine: Grey Literature [Monash University] [LIBGUIDE]
http://guides.lib.monash.edu/medicine/grey-literature

Patient Reported Outcome Measures (Excel List) [Australian Commission on Safety & Quality in Health Care]
https://www.safetyandquality.gov.au/wp-content/uploads/2017/01/PROMs-literature-review-Appendix-2-grey-literature-tabular-format.xlsx 

Grey Literature for the Health Sciences [University of Melbourne] [LIBGUIDE]
http://unimelb.libguides.com/greylithealth

Canada

Grey Literature Bibliography [Registered Nurses’ Association of Ontario]
http://rnao.ca/sites/rnao-ca/files/Grey_Literature_Bibliography.pdf

Public Health Grey Literature Resources [OPHLA, Ontario Public Health Libraries Association]
http://www.ophla.ca/pdf/Public%20Health%20Grey%20Literature%20Sources.pdf

Community Health & Epidemiology: Grey Literature [University of Saskatchewan] [LIBGUIDE]
https://libguides.usask.ca/communityhealth/greylit

Grey Literature for Health Sciences [University of British Columbia] [SUBJECT GUIDE]
http://guides.library.ubc.ca/greylitforhealth

Health Information Science: Grey Literature [University of Victoria] [LIBGUIDE]
https://libguides.uvic.ca/c.php?g=256582&p=1713411

Netherlands

Grey Literature for Health Sciences [VRJE Universiteit Amsterdam] [LIBGUIDE]
http://libguides.vu.nl/greylit

United Kingdom

Grey Literature for Medical Sciences: NHS Data [Newcastle University] [LIBGUIDE]
https://libguides.ncl.ac.uk/greylit

United States

Clinical & Translational Science Research Guide (CCTS): Sources for Grey Literature [University of Illinois, Chicago]
https://researchguides.uic.edu/c.php?g=252242&p=1683003

MGMT 7170: Healthcare Policy & Reform [Tulane University] [RESEARCH GUIDE]
https://libguides.tulane.edu/c.php?g=603370&p=4226718

DNP Doctor of Nursing Practice RBHS Grey Literature [Rutgers University] [RESEARCH GUIDE]
https://libguides.rutgers.edu/c.php?g=337213&p=2269177

Nursing – Graduate: Grey Literature [Grand Valley State University] [LIBGUIDE]
https://libguides.gvsu.edu/gradnursing/greylit

Nursing – Grey Literature [University of Illinois, Chicago] [RESEARCH GUIDE]
https://researchguides.uic.edu/c.php?g=252186&p=1684970

Finding Qualitative Research Articles: Grey Literature [Health Sciences Library, University of Washington] [LIBGUIDE]
http://guides.lib.uw.edu/hsl/qualres/grey

Grey Literature in Health & Biomedical Sciences [Univeristy of Illinois at Urbana-Champaign] [LIBGUIDE]
http://guides.library.illinois.edu/graylithealth

Literature Reviews: Grey Literature Gateways [Cummings Graduate Institute for Behavioral Sciences]
http://azhin.org/c.php?g=457546&p=3140772