Mmm… apparently all the photos are free for downloads at this site (hosted in Hungary) called stock.xchng (www.sxc.hu). The text on the front page says:
Welcome to Stock.XCHNG, the leading FREE stock photo site!
Whether you just want to browse our huge image gallery or want to share your personal photos with others, this is the site for you!
An impressive list of categories, judging from the drop menu. The categories range from “Abstract” to Objects to “Concepts” (like ‘Danger’). Certain categories may not have much photos. E.g. the one for “People-> Fashion-> Seniors” showed only three photos — but then, how many people actually upload such photos? You can do a right-click to download the images but I think login is required for the higher resolution ones.