A9.com  

Accoona, China/US  

Alexa Internet  

Alleba, Philippines  

AlltheWeb  

AltaVista  

Amatomu  

Ansearch, Australia/US/UK/NZ  

Answers.com  

AOL Search  

Araby, Middle East  

Ask.com (formerly Ask Jeeves)  

AskMeNow  

AskWiki  

Autonomy — IDOL Enterprise Desktop Search.  

Baidu, China  

Beagle — Open source desktop search tool for Linux based on Lucene  

Bioinformatic Harvester  

Bixee.com (India)  

blinkx  

Bloglines  

BlogScope  

Brainboost  

BrainBoost  

Btjunkie  

Business.com  

CareerBuilder.com (USA)  

Clusty  

CompuServe Search  

Copernic Desktop Search  

Craigslist (by city)  

DataparkSearch  

Daum, Korea  

Demonoid  

Docco — based on Apache's indexing and search engine Lucene, and it requires a Java Runtime Environment.  

Dogpile  

Earthoid.com  

EB-eye_EBI's_Search_Engine EMBL-EBI's Search engine  

Egothor  

eHow  

Eluta.ca (Canada)  

Entrez (includes Pubmed)  

Exalead  

Excite  

Ex.plode.us  

Filehawk — Indexes and searches files' content in computers, networks and removable data storage devices  

FindSounds  

FlixFlux  

Gaviri PocketSearch — Indexes desktop, network drives and portable devices.  

Géoportail  

Gigablast  

Gonzui  

GoodSearch  

Google  

Google Answers  

Google Code Search  

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  

Google Desktop — Integrates with the main Google search engine page.  

Google Groups (formerly Deja News)  

Google Maps  

Google News  

Google Product Search (formerly Froogle)  

GoPubMed (knowledge-based: GO - GeneOntology)  

Grokker  

Grub  

Guruji.com, India  

Healia  

Home.co.uk  

HotBot  

Hotjobs.com (USA)  

Ht://dig  

IceRocket  

IFACnet  

imgSeek — Desktop content-based image search  

Indeed.com (USA)  

Info.com  

Infoseek  

InfoSpace  

Inktomi  

Isohunt  

ISYS Search Software — ISYS:desktop search software.  

iWon  

Ixquick  

JExamples  

Kartoo  

Kelkoo  

KMLE Medical Dictionary  

Koders  

Krugle  

Lemur Toolkit & Indri Search Engine  

Lexis (Lexis Nexis)  

Lexxe  

Likasoft Archivarius 3000  

Live Search (formerly MSN Search)  

Lucene  

Lycos  

Lycos iQ  

MagPortal  

Mahalo.com  

Mamma  

MapQuest  

MeshPubMed (knowledge-based: MeSH - Medical Subject Headings)  

Metacrawler  

MetaLib  

Meta Tracker — Open Source Linux desktop search  

Miner.hu, Hungary  

Mininova  

mnoGoSearch  

Monster.com (USA)  

MozDex  

Ms. Dewey  

MSN Shopping  

Myriad Search  

MySimon  

MySpace Search  

Najdi.si, Slovenia  

Namazu  

Naukri.com (India)  

Naver, Korea  

Netscape  

Newslookup  

Nexis (Lexis Nexis)  

Nexis (Lexis Nexis)  

NexTag  

Nicado  

Northern Light  

Nutch  

Omgili  

OpenFTS  

Overture.com (formerly GoTo.com)  

Picsearch  

Podscope  

PolyMeta  

PriceRunner  

PubSub  

Quicklaw  

Quintura  

Quintura Kids  

Rambler, Russia  

Recruit.net (International)  

Rectifi  

Rediff, India  

Rightmove  

Ripple  

Rollyo  

SAPO, Portugal  

Sciencenet for scientific knowledge based on yacy technology  

Search.ch, Switzerland  

Searchmedica  

Search Wikia  

Shopping.com  

Shopzilla (also operates Bizrate)  

SideStep  

SimplyHired.com (USA)  

Singingfish  

Sphere  

Sphinx  

Spock  

Spotlight — Found in Apple Mac OS X "Tiger".  

SWISH-E  

Tafiti  

Technorati  

TEK  

Teoma  

Terrier Search Engine  

Terrier Search Engine — desktop search for Windows, Mac OS X (Tiger), Unix/Linux.  

TheFind.com  

The Pirate Bay  

Thomasnet (United States)  

TolMol.com (India)  

Topix.net  

TorrentSpy  

Trexy  

Tropes Zoom — Semantic Search Engine.  

Turbo10  

Veveo  

Walla!, Israel  

WebCrawler  

WebMD  

WestLaw  

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.  

Windows Live Maps  

Windows Live QnA  

Wink  

Wink provides web search by analyzing user contributions such as bookmarks and feedback  

WiseNut  

World Wide Web Worm  

X1 Professional Client (formerly X1 Desktop Search, then X1 Enterprise Client)  

Xapian  

YaCy  

Yahoo! Answers  

Yahoo! Kids  

Yahoo! Maps  

Yahoo! News  

Yahoo! Search  

Yandex, Russia  

Yellowpages.com  

Zabasearch.com  

Zettair  

Zillow.com  

ZoomInfo