Depending on the browser you use, the search box types right to left, and the results display mostly backward. You can search for words either backward or forward, but typing them backward is more fun.
ElgooG is a parody site originally designed and hosted by All Too Flat, a parody and comedy website. Although elgooG is not affiliated with Google appears in the fine print at the bottom of the elgooG search screen, a search of the Whois website reveals Google is indeed the owner of the site.
Although the site is intended as a joke, it has been maintained for several years and is periodically updated to reflect changes in the Google website. Search results in elgooG are pulled from the actual Google search engine and then reversed.