Noun Project
Launched in 2010, The Noun Project is an online catalog of downloadable icons and symbols submitted by designers around the world. Users may search for png or editable svg files of the icons.
Victoria and Albert (V&A) Museum Collections
The V&A Museum houses more than 1.1 million objects and works of art in their collections. Their digital collection currently contains more than 450,000 images covering a wide range of topics, which include ceramics, fashion, furniture, glass, metalwork, paintings, photographs, prints, sculpture, and textiles.
National Gallery (London) Paintings
The National Gallery in London contains the national collection of Western European paintings from the 13th to the 19th centuries, with works by Botticelli, Leonardo da Vinci, Rembrandt, Renoir, Van Gogh and more. The collection can be filtered by subjects, themes, artists, styles and timeline. Subjects include Travel, Still Life & Objects, People & Costume, Land, Sea & City, Work & Leisure, Seasons & Weather, Religious & Biblical, Mythological, Plants & Animals and Historical.
Rijksmuseum collections
The collection provides access to more than 125,000 paintings by Dutch artists, such as Rembrandt and Johannes Vermeer. Users can explore and search the entire collection, which is handily sorted by artist, subject, style and even by events in Dutch history. Each painting can be downloaded in high-resolution or view at close-up. The museum also provides an application, RijksStudio, to invite users to create their own masterpieces by downloading images of artworks or details of artworks in the Rijksmuseum collection and using them in a creative way.