General
GoGraph has a library of several thousand images. While the search has the options of animated gifs, photos, icons, and clip art, there are also wallpapers and website interfaces, all of which can be browsed with their directory (on the front page). Note, for personal purposes, you may freely use a limited number of images on your website, otherwise you must purchase. GoGraph is also available in a number of other languages, and they license their search to portals such as Yep.
Search Help
Searches are case insensitive, and they recommend using singular, not plural words.