Google might be the most popular search engine, but it's certainly not the only one!
Other big ones:
There is Yahoo of course, which has been around for as long as Google, and now there is Bing, the new Microsoft search engine which is supposed to be a big competitor to Google. To compare the results from Bing and Google, go to http://www.bing-vs-google.com/
Other exciting ones:
There are also many smaller search engines that experiment with new ways of searching and presenting the results. Here are some examples:
This search engine claims to provide more relevant results than Google, using only "trusted" web pages.
Izik is a tablet optimized search tool from Blekko.
Exalead uses new technology to better package the search results for the user.
Yippy is a metasearch engine: it queries multiple search engines and combines the results to be displayed as a group, or cloud, on one screen. It also claims to be better than other search engines at protecting your privacy.
This search engine gives you precise answers and facts about your topic.
Social Media Search Engines
The traditionnal search engines are not very effective at searching the web in real time or searching social media sites such as Twitter and Facebook. Use the following ones if you are interested in knowing what's said about a topid or a person on various social media sites in real time.
Topsy (www.topsy.com). Searches Twitter.
Whostalkin (Whostalkin.com). Searches real time conversations from 60 different social media gateways including Twitter and Facebook.
Twitter's own search engine (search.twitter.com/advanced)
Bing's search engines for social media (www.bing.com/social)