AMO: Daily Art Inspiration - Travel back in time to learn more about outstanding artworks
Google Arts & Culture - Explore collections of art and culture from around the world, both past and present.
Altamira - Altamira is a communal marketplace for art, artists, and their fans...
The Met - Official app of The Metropolitan Museum of Art
ML ART - A visual index with 340 creative Machine Learning projects!
artcyclopedia - online art database, focusing mainly on famous artists.