iLibrarian post: A Guide to Little-Known Image Collections with Millions of Free, Hi-Res Images
“…. There have been several new image collections that have opened up to the public just within the past year that not many people are aware of yet, but they offer access to thousands, or in some cases millions of outstanding photographs that can be downloaded for free….” [Link to full post.]
This is quite a treasure trove. Use of images will vary. For example: