Pixabay is a photo community that provides images on public domain. The site contains curated images contributed by photographers around the world. As of September 2015, there are more than 470,000 photographs, vectors and illustrations. Users can search by keywords or browse by various categories.
Provided by web design agency, IM Creator Ltd., IM Free Collections is “a curated collection of free web design resources”. The images are from various image sources that provided these images on Creative Commons licenses. Users can search or browse by various categories.
Funded by the Duke Endowment “Library 2000” Fund, Ad*Access is a project that presents images and database information for over 7,000 advertisements printed in U.S and Canadian newspapers and magazines between 1911 and 1955. The images provide a perspective of major campaigns and companies in 5 main areas: Radio, Television, Transportation, Beauty and Hygiene, and World War II.