The Medical Heritage Library (MHL), a digital curation collaborative among some of the world's leading medical libraries, promotes free and open access to quality historical resources in medicine. Public Domain
50 images from the scientific collection, includes excellent Charles Babbage related images. Available on Flickr under a Creative Commons Attribution Share Alike license.
Over 100,000 high resolution images including manuscripts, paintings, etchings, early photography and advertisements are freely available through Wellcome Images. All CC-BY