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
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