This seems like a useful piece of information for the cash strapped library!
It covers Flickr, Google Images, Image Chef, Free Stock Links, and Web 2.0 Badges.
The post gives hints on how to search for the legal and free stuff.
There’s always a way for library marketing and websites to look more professional and engaging. I know that I find it a lot of fun to find just the right image as a metaphor for my point or to attract attention and readers.
Source: Social Networking Librarian: http://socialnetworkinglibrarian.com/2011/02/09/great-places-to-find-free-images-for-library-marketing-and-more/