
Originally Posted by
Nominus Experse
* Alexa Internet
* Ask.com (formerly Ask Jeeves)
* Exalead
* Gigablast
* Google
* Live Search (formerly MSN Search)
* MozDex
* Yahoo! Search
* 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
* Brainboost
* Clusty
* Dogpile
* Excite
* HotBot
* Info.com
* Ixquick
* Krozilo
* Mamma
* Metacrawler
* MetaLib
* Myriad Search
* PolyMeta
* SideStep
* Turbo10
* WebCrawler
* 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
* Rambler, Russia
* Rediff, India
* SAPO, Portugal
* Search.ch, Switzerland
* Walla!, Israel
* Yandex, Russia
* Ex.plode.us
* InfoSpace
* Spock
* Wink
* Yellowpages.com
* Zabasearch.com
* ZoomInfo
* Nicado
* TEK
* Grokker
* Kartoo
* Quintura
* Answers.com
* AskMeNow
* AskWiki
* BrainBoost
* eHow
* Lexxe
* Lycos iQ
* Windows Live QnA
* Yahoo! Answers
* AOL Search
* CompuServe Search
* Evisum
* MySpace Search
* Mahalo.com
* Netscape
* Ripple
* AltaVista
* AlltheWeb
* Earthoid.com
* GoodSearch
* Rectifi
* A9.com
* Tafiti
* Ms. Dewey
* iWon
* Lycos
* Naukri.com (India)
* Bixee.com (India)
* TolMol.com (India)
* Craigslist (by city)
* Eluta.ca (Canada)
* CareerBuilder.com (USA)
* Hotjobs.com (USA)
* Indeed.com (USA)
* Monster.com (USA)
* Recruit.net (International)
* SimplyHired.com (USA)
* Amatomu
* Bloglines
* BlogScope
* IceRocket
* Sphere
* Technorati
* Blogoat
* Google News
* MagPortal
* Newslookup
* Nexis (Lexis Nexis)
* Topix.net
* Yahoo! News
* blinkx
* FindSounds
* Picsearch
* Podscope
* Veveo
* Google Code Search
* JExamples
* Koders
* Krugle
* ChaCha Search
* Mahalo.com
* Btjunkie
* Demonoid
* FlixFlux
* Isohunt
* Mininova
* The Pirate Bay
* TorrentSpy
* 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
* Home.co.uk
* Rightmove
* Zillow.com
* Thomasnet (United States)
* Business.com
* Nexis (Lexis Nexis)
* Google Product Search (formerly Froogle)
* Kelkoo
* MSN Shopping
* MySimon
* NexTag
* PriceRunner
* Shopping.com
* ShopWiki
* Shopzilla (also operates Bizrate)
* TheFind.com
* TolMol.com (India)
* Gιoportail
* Google Maps
* MapQuest
* Windows Live Maps
* Yahoo! Maps
* ChaCha Search
* Eurekster
* Google Co-op
* Rollyo
* Wink
* Trexy
* Yahoo! Kids
* Quintura Kids
* Autonomy IDOL Enterprise Desktop Search.
* Beagle Open source desktop search tool for Linux based on Lucene
* Copernic Desktop Search
* Docco based on Apache's indexing and search engine Lucene, and it requires a Java Runtime Environment.
* Filehawk Indexes and searches files' content in computers, networks and removable data storage devices
* Gaviri PocketSearch Indexes desktop, network drives and portable devices.
* Google Desktop Integrates with the main Google search engine page.
* imgSeek Desktop content-based image search
* ISYS Search Software ISYS:desktop search software.
* Likasoft Archivarius 3000
* Meta Tracker Open Source Linux desktop search
* Spotlight Found in Apple Mac OS X "Tiger".
* Terrier Search Engine desktop search for Windows, Mac OS X (Tiger), Unix/Linux.
* Tropes Zoom Semantic Search Engine.
* Windows Desktop Search MSN Search Toolbar includes Windows Desktop Search which incorporates much of the desktop search technology initially promised for Windows Vista, the next version of Microsoft Windows. The search integrates into the task bar and Internet Explorer windows.
* X1 Professional Client (formerly X1 Desktop Search, then X1 Enterprise Client)
* WestLaw
* Lexis (Lexis Nexis)
* Quicklaw
There are surely more, but have fun with these.