Don't forget to check earlier links:
PQDT (ProQuest Dissertations & Theses) Open – PQDT Open provides the full text of open access dissertations and theses free of charge.
Aalto ARTS Books (Open Access Research Literature) – More than 20 open access e-books on art, published by Aalto university in Finland.
Europeana – Europeana Collections provides access to over 50 million digitised items – books, music, artworks and more – with sophisticated search and filter tools to help you find what you’re looking for. You might be interested in: Art, Fashion, Photography
Digital Bodleian – Digital Bodleian makes portions of the Bodleian's extraordinary library collections open to a wide variety of users from around the world for learning, teaching and research. You might be interested in: Photographs ir Portraits.
The William Blake Archive – the Blake Archive was conceived as an international public resource that would provide unified access to major works of visual and literary art that are highly disparate, widely dispersed, and more and more often severely restricted as a result of their value, rarity, and extreme fragility. Digital edition of Blake/An Illustrated Quarterly.
Updated 2020 11 09
Cogent OA Journals – open access academic journals. You might enjoy: Cogent Arts & Humanities ; Cogent Education ; Cogent Business & Management ; Cogent Social Sciences.
Library and Archives Canada Collections – You might be interested in: Theses Canada; Arts; Photography.
VADS (Visual Arts Data Service) – UK national open access collection of more than 140 000 images of art, architecture, design, fashion, media, etc. VADS is a service of the library at the University for the Creative Arts.
The Metropolitan Museum of Art (Book titles with full-text online) – Met museum (USA) open access books. You might be interested in: Modern Design in The Metropolitan Museum of Art, 1890–1990 ; Vincent van Gogh: The Drawings ; The Metropolitan Museum of Art Bulletin ; Metropolitan Museum Journal.
Updated 2020 12 10
HathiTrust Digital Library – 17 million open and partially open access publications on art and other topics from USA universities libraries. You might be interested in: American Art Annual ; Art Books ; Art History ; Artists Painter History ; Architecture ; Architecture Plan ; Bulletin - Metropolitan Museum of Art ; Bulletin of the Art Institute of Chicago ; Cartoons and Comics ; General Arts ; Graphic Design ; Estampes ; Indianapolis Museum of Art at Newfields ; Painting ; Sculpture ; 19th Century Women's Fashion Magazines.
International Journal of Design – reviewed open access design journal, published by National Taiwan University of Science and Technology. Journal is recognised by academic databases: Web of Science and Scopus.
SAGE Gold Open Access Journals – reviewed open access academic journals from SAGE press. You might be interested in SAGE Open journal where you can browse by topcis: Humanities ; Communication ; Education ; Business and Management and other.
Brill Open Access Content – open access journal articles and books chapters published by humanitarian and social sciences press Brill. You might be interested in Art History ; Literature and Cultural Studies ; History.