Here are some interesting pics from five of my favorite Flickr freebie image sources (and to go to the complete collection, click on the name):
Library of Congress
The National Archives UK
National Library of Ireland on the Commons
As to what you can do with them -- here's what I did just having some fun:
What happens when a Prohibition-era housewife opens the wrong bottle (I might actually have to write this one.)
Docket builds a defensive corset and all hell breaks loose. Or not.
Or maybe just the responses I wanted to send but didn't . . .