Google didn’t always exist – I can remember magazine articles suggesting that geeky people try this “new” search engine, recently renamed from BackRub. They also had an exclamation mark in those days.
But today Google has even become a verb – look here.
But there are other search engines out there and the BBC has gathered together some alternatives.
BBC News – Google: Alternatives to the search giant.
However they mention Bing but forget the long established Yahoo! – who still retain their exclamation mark!