Sick to death of the rotten stick figures that come with PowerPoint? Want to punch up your presentations, your blog, your Web site? Getting ready to shell out money for custom or stock photography? Don't. Instead, get free photos at Yotophoto or Everystockphoto.
These sites index royalty-free photography. Both have search engines, and both index--they don't store--photos from various sources around the Web (including Wikipedia, Flickr, and other sites). In my quick tests, the Yotophoto search engine performed better, generally returning more relevant hits.