"Free to Use" Photos
"PhotoPin helps bloggers find photos for their blog and makes adding them to their post fast and easy. Just search for any topic using the search box (ex: passion, puppies, etc.), preview the photo, and click "get photo" to download the photo as well as the proper attribution link. If you prefer to pay for the photo rather than linking to it, the results at the top will take you to a partner stock photo site where you can buy the photo."