Open Access Repositories and Databases

https://v2.sherpa.ac.uk/opendoar/	global directory of open access repositories
https://zenodo.org/	multidisciplinary repository
https://www.preprints.org/	multidisciplinary repository
https://www.biorxiv.org/	natural sciences
https://www.medrxiv.org/	medical sciences
https://psyarxiv.com/	behavioral sciences
https://osf.io/preprints/socarxiv	social and humanistic sciences
http://lawarxiv.info/	legal sciences
https://arxiv.org/	physics, mathematics, computers

http://unpaywall.org/	multidisciplinary
https://www.doaj.org/	multidisciplinary
https://www.springeropen.com/	multidisciplinary
https://pubchem.ncbi.nlm.nih.gov/	natural sciences, biotechnology
https://openbiomaps.org/	biodiversity
https://plos.org/	multidisciplinary
https://archive.org/	multidisciplinary
https://www.gfmer.ch/Medical_journals/Free_medicalTemplate.htm	medical sciences
https://www.cairn.info/Accueil_Revues.php	social sciences and humanities
https://researchworks.oclc.org/archivegrid/	museum, library and historical material