Alexa Web Search: analyzes site traffic including ranking, global users, pages linking to the site, and links to related pages of interest

AllTheWeb : returns results quickly from a database gathered by the Yahoo! crawler; offers multimedia and news searches; has a good advanced search interface

AltaVista :
searches Web sites with advanced Boolean and field search options. See also Babel Fish, the AltaVista translation service.

Ask.com :
general search engine enhanced by a number of specialty searches including a dictionary, thesaurus, currency converter, encyclopedia, maps, news and more

Bing :
Microsoft engine that displays excerpts from sites retrieved by your search and offers related search suggestions; multimedia and other deep Web results are also displayed. Bing focuses on searches related to making a purchase decision, planning a trip, researching a health condition, and finding a local business. Also check out Bing Maps Beta.

ChaCha :
search engine that offers live human guides to help answer queries; focuses on questions from mobile devices

Exalead :
offers concept clustering of results, thumbnail images of retrieved sites, and customization options such as organization of results by file type, geography or modification date

Factbites :
searches for full topic matches and returns meaningful, full sentence excerpts of sites in its results list

Google :
Web's most popular search engine that retrieves results in real time as you type your search. Also check out Eco Smart Search.com, a Google-powered search engine with a black background display that saves energy.

Hakia :
organizes results into types of information sources, including "credible " sites recommended by librarians

iSEEK Education :
offers authoritative resources from university, government, and established noncommercial providers; organizes results into concept clusters, and also allows users to recommend and rate sites

Lycos :
general search engine that also offers searches of a few deep Web content sources including people look-up, yellow pages, and multimedia

Quintura :
displays a type of tag cloud with keywords related to your search that can be selected to generate new results

Search Edu.com :
service that limits results to the .edu, domain; also offers to search well-known dictionaries, encyclopedias, almanacs, etc.

Snappy Fingers :
searches millions of Frequently Asked Questions (FAQs) for answers to user queries

Sproose :
searches Yahoo! and allows users to comment on and vote on its search results

Webbrain :
offers results in visual layout of related terms for subsequent searching

Wolfram Alpha :
enter a question or calculation, and Wolfram Alpha uses its built-in algorithms and own collection of data to compute the answer

Yahoo :
portal with a general Web search and many other content services.