The resources below offer images that are freely available, with varying conditions of use (e.g., Creative Commons licenses such as Attribution; Attribution-ShareAlike; Attribution-NonCommercial; etc.):
- Creative Commons Search – images, music, video
- Digital Public Library of America (DPLA)
- Flickr: The Commons
- Getty Search Gateway Open Content
- Internet Archive – text, image, audio, video
- Internet Archive Book Images (in Flickr)
- Public Domain Archive
- The Public Domain Review
- Wikimedia Commons