I have to agree with everyone else here: citing the sources is *very* important to avoid confusions.
Anyways, Google is indeed not alone, as
this site should tell you with "over 12,500 links to local, regional, national, and foreign internet search engines, web directories, pay per click search engines and meta search engines."
Oh and there is
CompletePlanet, claiming to index "over 70,000+ searchable databases and specialty search engines." Enough?