ElgooG

elgooG (Google spelled backwards) is the literal mirror image of the engine searcher; not only is all of its content a reversal of Google, the search terms must also be written in reverse in order to yield the desired results. Though originally created by All Too Flat "for fun", it had found practical use in the People's Republic of China after the domestic banning of Google, as it circumvented China government's firewalls. Another important aspect is that because search terms in elgooG were typed in reverse, and the search results were also in reverse, it made it harder for intermediates to track on what users were searching for.