What is a website search engine?

A search engine is an information retrieval system designed to help find information stored on a computer system. Search engines help to minimize the time required to find information and the amount of information which must be consulted, akin to other techniques for managing information overload

The most public, visible form of a search engine is a Web search engine which searches for information on the World Wide Web.

General search engines
Alexa Internet
Ask.com (formerly Ask Jeeves)
Exalead
Gigablast
Google
Live Search (formerly MSN Search)
Yahoo! Search

[edit] Open source search engines
DataparkSearch
Egothor
Gonzui
Grub
Ht://dig
Isearch
Lucene
Lemur Toolkit & Indri Search Engine
mnoGoSearch
Namazu
Nutch
OpenFTS
Sciencenet (for scientific knowledge, based on YaCy technology)
Search Wikia
Sphinx
SWISH-E
Terrier Search Engine
Xapian
YaCy
Zettair

[edit] Metasearch engines
Brainboost
Clusty
Dogpile
Excite
HotBot
Info.com
Ixquick
Krozilo
Mamma
Metacrawler
MetaLib
Myriad Search
SideStep
Surfwax
Turbo10
WebCrawler
See also: Metasearch engine

[edit] Regional search engines
Accoona, China/US
Alleba, Philippines
Ansearch, Australia/US/UK/NZ
Baidu, China
Daum, Korea
Guruji.com, India
Araby, Middle East
Miner.hu, Hungary
Najdi.si, Slovenia
Naver, Korea
Onkosh, Middle East
Rambler, Russia
Rediff, India
SAPO, Portugal
Search.ch, Switzerland
Sesam, Norway, Sweden
Walla!, Israel
Yandex, Russia

[edit] People search engines
Ex.plode.us
InfoSpace
Spock
Wink
Zabasearch.com
ZoomInfo

[edit] Email-based search engines
Nicado
TEK

[edit] Visual search engines
Grokker
Kartoo

[edit] Answer-based search engines
Answers.com
AskMeNow
AskWiki
BrainBoost
eHow
Lexxe
Lycos iQ
Windows Live QnA
Yahoo! Answers

[edit] Google-based search engines
AOL Search
CompuServe Search
MySpace Search
Netscape
Ripple

[edit] Yahoo!-based search engines
AltaVista
AlltheWeb
Earthoid.com
GoodSearch
Rectifi

[edit] Windows-Live-based search engines
A9.com
Tafiti
Ms. Dewey

[edit] Ask.com-based search engines
Hakia (semantic search)
iWon
Lycos

[edit] Job search engines
Bixee.com (India)
CareerBuilder.com (USA)
Craigslist (by city)
Eluta.ca (Canada)
Hotjobs.com (USA)
Indeed.com (USA)
Monster.com (USA)
Naukri.com (India)
Recruit.net (International)
SimplyHired.com (USA)
TolMol.com (India)
See also: Job search engine and Category:Job search engines

[edit] Forum search engines
Omgili

[edit] Blog search engines
Amatomu
Bloglines
BlogScope
IceRocket
Sphere
Technorati

[edit] News search engines
Google News
MagPortal
Newslookup
Nexis (Lexis Nexis)
Topix.net
Yahoo! News

[edit] Multimedia search engines
blinkx
FindSounds
Picsearch
Podscope
Veveo

[edit] Code search engines
Google Code Search
JExamples
Koders
Krugle

[edit] BitTorrent search engines
These search engines work across the BitTorrent protocol.

Btjunkie
Demonoid
FlixFlux
Isohunt
Mininova
The Pirate Bay
TorrentSpy

[edit] Accountancy search engines
IFACnet

[edit] Medical search engines
Bioinformatic Harvester
Entrez (includes Pubmed)
EB-eye_EBI's_Search_Engine EMBL-EBI's Search engine
GoPubMed (knowledge-based: GO - GeneOntology)
Healia
KMLE Medical Dictionary
MeshPubMed (knowledge-based: MeSH - Medical Subject Headings)
Searchmedica
WebMD

[edit] Property search engines
Home.co.uk
Rightmove
Zillow.com
Properazzi

[edit] Business search engines
BizCron (North America)
Thomasnet (United States)
Business.com
Nexis (Lexis Nexis)

[edit] Comparison shopping search engines
Google Product Search (formerly Froogle)
Kelkoo
MSN Shopping
MySimon
NexTag
PriceGrabber
PriceRunner
Shopping.com
ShopWiki
Shopzilla (also operates Bizrate)
TheFind.com
TolMol.com (India)

[edit] Geographic search engines
GÃ©oportail
Google Maps
MapQuest
Windows Live Maps
Yahoo! Maps

[edit] Social search engines
ChaCha Search
Eurekster
Google Co-op is a platform provided by Google that allows web developers to feature specialized information in web searches, refine and categorise queries, and create customized search engines
Mahalo.com
Rollyo
Wink provides web search by analyzing user contributions such as bookmarks and feedback
Trexy