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Major Search Engines 100+

MetaCrawler is a metasearch engine that blends the top web search results from Google, Yahoo!, Live Search, Ask.com, About.com, MIVA, LookSmart and other popular search engines. MetaLib, MetaLib is a federated search system. 

Type
 Search Engine Description
All-Purpose
Search
Engines
 Google Google - The world’s most popular search engine.
Yahoo! Search Yahoo! Search: The 2nd largest search engine on the web (as defined by a September 2007 Nielsen Netratings report.
AltaVista AltaVista: Launched in 1995, built by researchers at Digital Equipment Corporation’s Western Research Laboratory. From 1996 powered Yahoo! Search, since 2003 - Yahoo technology powers AltaVista.
Excite Excite: Now an Internet portal, was once one of the most recognized brands on the Internet. One of the famous 90’s dotcoms.
Go.com Go.com: The Walt Disney Group’s search engine is now also an entire portal. Family-friendly!
HotBot HotBot was one of the early Internet search engines (since 1996) launched by Wired Magazine. Now, just a front end for Ask.com and MSN.
AllTheWeb AllTheWeb: Search tool owned by Yahoo and using its database, but presenting results differently.
Galaxy Galaxy: More of a directory than a search engine. Launched in 1994, Galaxy was the first searchable Internet directory. Part of the Einet division at the MCC Research Consortium at the University of Texas, Austin
AOL Search search.aol: Now powered by Google. It is now official.
Live Search Live Search (formerly Windows Live Search and MSN Search) Microsoft’s web search engine, designed to compete with Google and Yahoo!. Included as part of the Internet Explorer web browser.
Lycos Lycos: Initial focus was broadband entertainment content, still a top 5 Internet portal and the 13th largest online property according to Media Metrix.
Gigablast GigaBlast was developed by an ex-programmer from Infoseek. Gigablast supports nested boolean search logic using parenthesis and infix notation. A unique search engine, it indexes over 10 billion web pages.
Alexa Internet Alexa Internet: A subsidiary of Amazon known more for providing website traffic information. Search was provided by Google, then Live Search, now in-house applicaitons run their own search.
Accounting
 IFAC.com: For resources and information on Ifrs and Accounting.
Bit Torrent
btjunkie Btjunkie: An advanced BitTorrent search engine. It uses a web crawler (similar to Google) to search for torrent files from other torrent sites and store them in its database. It has over 1,800,000 active torrents.
Demonoid.com Demonoid: A BitTorrent tracker set up by a person known only as Deimos. The website indexed torrents uploaded by its members. Taken offline after legal threats to its Hosting Company by CRIA.
FlixFlux FlixFlux: From its website, “The ultimate torrent site for films, combining bittorrent search results with film information, making it easy to find new film releases.”
isoHunt isoHunt, a comprehensive BitTorrent search engine, P2P file search and community. Over 930,000 torrents in its database and 16 million peers from indexed torrents. Avg: 40 million searches per month.
MiniNova Mininova: Successor to Suprnova.org - a search engine and directory of torrent files. Anonymous uploads, no IP address logging of users, no porn. over 550,000 torrents in the database, over 4 Billion downloads.
The Pirate Bay The Pirate Bay (aka “TPB”): Based in Sweden where torrent trackers are not illegal. No content is filtered or removed as long as it is clearly labeled.
TorrentSpy TorrentSpy: Tracks externally hosted torrent files and provides a forum to comment on them. Integrates Digg-like user-driven content site ShoutWire’s feed into its front page.
Torrentz Search Engine Torrentz: Tracks nearly 7 million torrents in a searchable portal.
Blog
 Amatomu Amatomu: The South African Blogosphere, sorted. Amatomu searches blogs with a distinct focus on South Africa.
Bloglines Bloglines is a web-based news aggregator for reading syndicated feeds using the RSS and Atom formats. Sold to Ask.com in 2005.
Blogperfect: Google Powered Blog Search
Blogscope BlogScope: Search & analysis tool for the blogosphere being developed as part of a research project at the University of Toronto. Itcurrently tracks over 23.5 million blogs with 275.6million posts.
icerocket IceRocket: An Internet search engine for searching blogs.
Sphere Sphere connects your current articles to contextually relevant content from your archives as well as from Blog Posts, Media Articles, Video, Photos, and Ads from across the Web.
Technorati catalogs over 112 million weblogs. Known as a kind of gauge for blog popularity as epitomized by its byline of “What’s percolating in blogs now”. A supporter and contributor to open source software.
Business
 AliBaba Alibaba.com - Claims to be the world’s largest database of suppliers. Based in China, it is a marketplace of export and import, offers search, company directory, catalog, trade leads and more.
Bankers' Almanac Bankersalmanac.com provides intelligent reference data solutions to the banking industry for payments, due diligence, risk assessment and financial research.
Business.com business.com: contains more than 400,000 listings within about 65,000 categories. Search results are preceded by four types of paid links.
Hoovers Hoovers: A Dun & Bradstreet Company, maintains a databas of over 23 million companies. Some information is provided free, other information is available to paid subscribers. Good for company stock information.
Kompass Kompass: 2.3M companies in 70 countries referenced by 57.000 product & service keywords 860.000 trade names and 4.6M executive names. A guide for worldwide sourcing.
Lexis Nexis Lexis Nexis: LexisNexis claims to be the “world’s largest collection of public records, unpublished opinions, forms, legal, news, and business information”. Searchable archive of newspapers, public records & more.
ThomasNet - Powered by the Thomas Register ThomasNet: Powered by the Thomas Register of American Manufacturers (The Big Green Books published since 1898). Catalogs over 650,000 American companies in 67,000 categories.
Email
 Nicado Nicado: Free to register, Search email addresses. The Nicado search engine allows registered users to search the Nicado database using an email address or telephone number.
TEK TEK search engine is an email-based search engine developed at the Massachusetts Institute of Technology. The search engine enables users to search the Web using only email. It is intended to be used by people with low internet connectivity.
Enterprise
 AskMeNow AskMeNow: S3 - Semantic Search Solution for mobile telephones. AskMeNow offers a consumer mobile search utilizing proprietary technology & natural language based interaction.
Autonomy Autonomy: IDOL Server (Intelligent Data Operating Layer), K2 Enterprise (Formerly Verity), Ultraseek
Dieselpoint Dieselpoint: Search & Navigation. Dieselpoint provides advanced full-text search with data navigation capability. It gives users highly relevant results not possible with either traditional search engines or SQL databases.
dt Search dtSearch Engine (SDK), dtSearch Web. dtSearch provides simple to use but very powerful tools which create and maintain full text indexes of documents and data. Terabytes of text can be searched.
Endeca Endeca’s search and information access solutions help enterprises find, analyze, and understand information. This is the Guided Navigation experience.
Exalead Exalead: exalead one: Enterprise. Exalead - Internet search engine, image search engine, video search engine … WebImagesWikipediaVideoMore » · Advanced search. 8 billion pages indexed to date.
Expert System Sp. A. Expert System Sp. A. (Cogito) is a pioneer in developing semantic technologies to understand and manage unstructured information. Expert System’s semantic approach enables rapid classification of information.
Fast Search & Transfer Fast Search & Transfer: Enterprise Search Platform (ESP), RetrievalWare (formerly Convera)
Funnelback Funnelback is an Internet and Enterprise search engine company offering a suite of search solutions, hosted solution for the web and a fully customisable enterprise solution for searching behind the firewall.
Google Search Applicance Google Search Appliance: Make it as easy for employees to find information inside your organization as it is to find information on google.com. Deploy a Google Search Appliance.
Microsoft Office SharePoint Microsoft’s SharePoint Search Services: Microsoft Search Server (MSS) is an enterprise search platform from Microsoft, based on MS Office SharePoint Server. MSS shares its architecture with Windows Search.
Northern Ligh SearchNorthern Light Northern Light Search: Search articles from over 800 online news feeds and over 1,000 industry authority blogs.
Opent Text / Hummingbird Open Text (Hummingbird): Enterprise Content Management (ECM) software solutions supporting +/- 20 million seats across 13,000 deployments in 114 countries and 12 languages worldwide.
Oracle Secure Enterprise Search 10g Oracle Secure Enterprise Search 10g, a standalone product from Oracle, enables a secure, high quality, easy-to-use search across all enterprise information assets.
SAP Trex SAP NetWeaver Search and Classification (TREX) finds information in both structured and unstructured data. TREX provides SAP applications with services for searching and classifying large collections of documents.
SAIC Teratext TeraText Suite: Most data resides in semi-structured, primarily textual documents, not in structured, organizational repositories. Teratext is designed for text-rich data repositories.
Vivisimo Vivisimo Clustering Engine developed by scientists based upon a mathematical algorithm and deep linguistic knowledge to find relationships between search terms and bring them to light. (Web search: Clusty)
ZyLAB Technologies ZyIMAGE Information Access Platform for government and corporates does capturing, archiving, searching, security, and context-specific content-management.
Forum
 Omgili (Oh My God, I Love It!): Find out what people are saying. Personal experiences, solutions to problems, ideas and opinions.
Games
 Cheatsearch - Find game cheats Cheatsearch.org: Finds Game Cheats from all over the web. Searches all of the most popular cheat sites and forums to find cheats for any game.
Genie Knows Genie Knows: A division of IT Interactive Services Inc., a Canadian vertical search engine company concentrating on niche markets: health search, video games search, and local business directory search.
Wazap Wazap is a vertical search engine, video game database and social networking site that distributes gaming news, rankings, cheats, downloads and reviews.
Human
Search
 ChaCha ChaCha Search is a search engine that pays human “guides” to answer questions for users. This is a technique known as social searching.
Eurekster Eurekster is a New Zealand company, with an office located in San Francisco, California, that builds social search engines for use on websites, the search engines are called swickis (search+wicki).
Mahalo Mahalo.com is a web directory (or human search engine) - the project is in beta test. It differentiates itself from algorithmic search engines by tracking and building hand-crafted results for searches.
Rollyo Rollyo is a Yahoo!-powered search engine which allows users to register accounts and create search engines that only retrieve results from the websites and blogs they want to include in their search results.
Trexy Trexy: Search trails are the click pathways you create while searching and finding information on 4,000+ search engines. Record and share your “search trails”. Easier searching of the “deep web”.
Wink Wink: Wink People Search: Over 333,304,647 people on social networks and across the Web. Find people using name search, location, school, work, interests, and more.
International
 Accoona: A search engine that uses artificial intelligence. In addition to traditional searches, it allows business profile searches, and its signature “SuperTarget” feature. Partnered with China Daily, a large Chinese portal.
Alleba Alleba: Philippines search engine and highly organized directory of Filipino websites.
Ansearch Ansearch: Australia/NZ/UK/US. Ansearch Ltd is involved in various online media activities, including the Ansearch.com.au search engine and the Soush online media network
Araby Araby: Middle East - Arabic language search engine owned by the Maktoob Group, which owns the world’s largest online Arab community; Maktoob.com. (Arabic only)
Baidu Baidu: China - The Google of China, Baidu is doing what no other Internet company has been able to do: clobbering Google and Yahoo in its home market.
Daum Daum: Korea - Daum is a popular web portal in South Korea which offers many Internet services including search, a popular free web-based e-mail, messaging service, forums, shopping and news.
Guruji Guruji.com: India - an Indian Internet search engine that is focused on providing better search results to Indian consumers, by leveraging proprietary algorithms and data in the Indian context.
Goo goo: Japan - an Internet search engine and web portal based in Japan, which crawls and indexes primarily Japanese language websites. goo is operated by the Japanese telecomm giant NTT.
Miner Miner.hu: Hungary - a vertical search engine for searching blogs, videos and other Hungarian content on the internet. Miner.hu indexes about 129.000 blogs.
Najdi.siNajdi.si Najdi.si: Slovenia - a Slovenian search engine and web portal created by Interseek. It’s the most visited website in Slovenia. It uses a technology created by Interseek written entirely in Java
Naver Naver: Korea - The undisputed number 1 search engine in Korea with over 16 million visitors and 1 billion page views per day.
Onet Onet: Poland - Polish language web portal and search.
Onkosh Onkosh: Middle East - Arabic language search.
Rambler Rambler: Russia -offers proprietary web search (Rambler Search), e-mail, rating and directory, media, ecommerce and other services to the Russian-speaking websurfer.
Rediff Rediff: India - India’s leading internet portal for news, mail, messenger, entertainment, business, mobile, ecommerce, shopping, auctions, search, sports and more.
Sapo SAPO: Portugal - Portuguese language search based in Portugal and focused on Portugal.
Search.CH Search.ch: Switzerland - a search engine and web portal for Switzerland. Founded in 1995 as a regional search engine, later many other services were added: phonebook, SMS service. Acquired by the Swiss Post.
Sesam Sesam: Norway, Sweden - Based in Norway and focused on Norway and Sweden.
Walla (in Hebrew) Walla!: Israel - Search the web in Hebrew with an Israel focus.
Yandex Yandex: Russia - Yandex (Russian: Я́ндекс) is a Russian search engine and one of the largest Russian Web portals. Yandex was launched in 1997.
Job
 Bixee (India) Bixee (India): Comprehensive jobsearch for India.
Career Builder Career Builder: The career builder website.
Craig's List Craig’s List: is a centralized network of online communities, with free classified ads (with jobs, internships, housing, personals, services, community, gigs, resume, and pets categories) and forums.
CV Fox | Find resumes (CV's) from all over the World Wide Web CV Fox: A search engine that is designed to hunt down and retrieve resumes (CV’s) from all over the Internet. Free to use, has become a popular tool with professional recruiters.
Dice.com Dice.com is the #1 technology job board. For technology experts in areas such as Information Technology (IT), software, high tech, security, biotech, and more. Recently purchased eFinancialCareers.com.
Eluta.ca Eluta.ca (Canada) - High-paying jobs in Canada directly from employers’ websites. Seach new full-time jobs at 71000+ employers across Canada.
HotJobs Hot Jobs (Yahoo): Find a job, post your resume, research careers at featured companies, compare salaries and get career advice on Yahoo! HotJobs.
Incruit (Korea) Incruit (Korea): Incruit claims to be the first Korean match making site between job seekers and companies and claims the first Korean Internet résumé database (June 1. 1998).
Indeed.com Indeed.com: A job ‘meta-search’ that scours job boards, newspapers and multiple sources with one search interface.
Jobs.pl (Poland) Jobs.pl (Poland): Run by an American/Polish team of MBA’s, Poland’s leading job portal. Partially owned by European Media Group “Orkla Press” from Scandinavia.
JobsDB (Asia/Pacific) JobsDB (Asia/Pacific): An Asia/Pacific focused job and recruitment site with databases dedicated to each country in the Asia/Pacific region.
JobPilot JobPilot (Owned by Monster): A European job site now owned by Monster.com. Focused on European jobs with branches in a number of European countries.
JobServe Jobserve: UK based job search focused originally on IT Contracting work, but now covering multiple areas. Resume database, large number of job postings.
Monster.com Monster.com: The world’s largest resume database and online job search.
Naukri (India) Naukri.com (India): An India-focused job search engine.
Recruit.net Recruit.net: A job search engine that allows you to search jobs worldwide.
Simply Hired SimplyHired.com - Job search engine. Search over 5 million job listings and thousands of jobs sites to find a job you love.
StepStone StepStone (Europe): European online recruitment site based in Scandinavia with operations and subsidiaries througout Europe.
The Ladders TheLadders.com (USA) Job search for professional jobs in the most comprehensive source of $100K+ jobs on the internet.
Legal
 Canadian Law List Canadian Law List: List of Canadian lawyers.
Lawyers.com Lawyers.com: Another LexisNexis company
FindLaw FindLaw: Search FindLaw’s database of 1,000,000 lawyers to find attorneys in your area. All Topics in FindLaw are geared for the Public, by Subject Area.
The Lawyers List The Lawyers’ List: Search for lawyers all across the United States.
Lexis Nexis LexisNexis: Provider of legal, government, business and high-tech information sources. By subscription only.
Martindale.com® Martindale.com and LexisNexis, a division of Reed Elsevier Inc.
QuicklawTM LexisNexis owned portal for searching for lawyers and things legal (Canada)
Maps
 GeoPortail Géoportail: French Geographic portal. French language only.
Google Maps Google Maps: Provides directions, interactive maps, and satellite/aerial imagery of the United States as well as other countries. Can also search by keyword such as type of business.
Mapquest MapQuest (AOL) was founded in 1967 as Cartographic Services, a division of R.R. Donnelley & Sons & became an independent company in 1994. MapQuest was acquired in 2000 by America Online, Inc.
Via Michelin Michelin (Via Michelin): The European map specialists’ webpage includes standard map features with good European coverage.
LiveSearch Maps Windows Live Maps: Enter an address, click enter… be sure to check out “Bird’s Eye View”. You can see a close-up aerial view of nearly any US Address and many foreign ones. Amazing.
Yahoo Maps Yahoo Maps: Maps, directions, reverse-directions satellite view but no ‘bird’s-eye-view’.
Medical
 Bioinformatic Harvester Bioinformatic Harvester: From the Karlsruhe Institute of Technology, the Bioinformatic Harvester crawls and crosslinks dozens of bioinformatic sites and serves 10’s of thousands of pages daily.
Entrez (Pubmed) Entrez (Pubmed): The life sciences search engine.
EB-Eye Bioinformatics Search EB-Eye - EMBL-EBI’s (European Bioinformatics Institute): Open-source, high-performance, full-featured text search engine library written entirely in Java. Very fast access to the EBI’s data resources.
Genie Knows Genie Knows: A division of IT Interactive Services Inc., a Canadian vertical search engine company concentrating on niche markets: health search, video games search, and local business directory search.
GoPubMed GoPubMed: Knowledge-based: GO - GeneOntology - Searching sorted - Social network and folsonomy for sciences.
Healia Healia: The health search engine. From the site, “The high quality and personalized health search engine”.
KMLE King's Medical Library Engine KMLE (King’s Medical Library Engine): Full American Heritage Stedman’s Medical Dictionary comprehensive resource including tens of thousands of audio pronunciations and abbreviation guides.
MeshPubMed MeSH - Medical Subject Headings (GoPubMed): Knowledge-based.
SearchMedica SearchMedica: Professional Medical Search
WebMD WebMD: A source for health information, a symptom checklist, pharmacy information, and a place to store personal medical information.The leading US Health portal, it scores over 40 million hits per month.
MetaSearch
 Brainboost Brainboost: Now Answers.com. Type in a question in natural language, get an answer.
Clusty - The Clustering Search Engine Clusty: The clustering search engine powered by Vivisimo.
Dogpile Dogpile: Brings together searches from the top search engines including Google, Yahoo! Search, Live Search, Ask.com, About, MIVA, LookSmart, and more.
Excite Excite: Now an Internet portal, was once one of the most recognized brands on the Internet. One of the famous 90’s dotcoms.
HotBot HotBot was one of the early Internet search engines (since 1996) launched by Wired Magazine. Now, just a front end for Ask.com and MSN.
Info.com Info.com: Metasearch bringing together results from the top search engines.
ixquick ixquick: Eliminate Big Brother! The Ixquick metasearch engine permanently deletes all personal search details gleaned from its users. Based in the Netherlands, results come from 11 search engines.
Kayak Kayak: Metasearch for travel - search 140 travel sites all at once for the best deals and buy tickets and make reservations direct.
Krozilo Krozilo is a virtual web browser, similar to My Yahoo!, iGoogle, Pageflakes, Netvibes, and Microsoft Live. Krozilo uses AJAX and DHTML, so does not require installation.
Mamma Mamma: “The Mother of All Search Engines” - was one of the web’s first metasearch engines (1996). Now owned by Copernic Inc. of Montreal, Canada, Mamma.com is a tier 2 search engine.
Metacrawler MetaCrawler is a metasearch engine that blends the top web search results from Google, Yahoo!, Live Search, Ask.com, About.com, MIVA, LookSmart and other popular search engines.
MetaLib MetaLib is a federated search system developed by Ex Libris. MetaLib conducts simultaneous searches in multiple resources such as library catalogs, journal articles, newspapers and the web.
Mobissimo Mobissimo.com is a travel meta-search website. Like other travel meta-search websites, Mobissimo does not sell directly to the consumer but consolidates travel offerings for a referral fee.
Myriad Myriad Search: Ad-free search lets users select results from Ask Jeeves, Google, MSN, and Yahoo! Select search depth and place bias on the search results from the major search engines.
Sidestep Sidestep: Searches over 200 travel-relates websites for airfares & the best deals on airfare. Find cheap airfares, discount hotels, car rentals and cruise deals to popular travel destinations worldwide.
Surfwax Surfwax offers a variety of tools for finding, saving, and sharing information on the Internet, including Nextaris, the law-article research site LawKT, the SurfWax meta-search and SurfWax Scholar services.
Turbo 10 - Search the Deep Net Turbo10.com is a metasearch engine which uncovers information in the Invisible Web. Turbo10 can access information from 800 online databases and searches 10 databases simultaneously.
Webcrawler WebCrawler was used to build the first publicly-available full-text index of a subset of the Web. WebCrawler® brings users the top search results from Google, Yahoo!, Windows Live, Ask and other popular search engines.
MultiMedia
 YouTube YouTube: Owned by Google, the web’s largest media site. This search will search through the videos of YouTube only.
blinkx: Over 18 million hours of video . Search it all. Blinkx is a multi-media metasearch engine searching the media files of sites such as YouTube, MetaCafe, GoogleVideo, MySpace and more.
FindSounds FindSounds: Search engine to find any kind of sound file: WAV, MP3, AIFF, AU - search by sample rate and quality… a great place to find those sound effects.
MetaCafe MetaCafe: Search videos hosted by MetaCafe. If you are a producer of videos, you can get paid for videos - the more viewers, the more cash.
Musgle Musgle: Music Search (mp3, wav, etc.): Based upon a JavaScript that automatically inserts a clever boolean search string into Google to return catalogs of hidden MP3 and Music files.
PBS PBS provides resources to air its standard programming & also provides its audience with multiple online archives of specific video programs. All video archives can be searched for any spoken word pronounced in them.
Picsearch Picsearch: Search the web for images. An image search service with more than 2,000,000,000 pictures.
Podscope Podscope: “Introducing: the first search engine that can find podcasts according to the words spoken during them!”. Finds audio and video files based upon actual content!
SpeechBot SpeechBot is a search engine for audio & video content that is hosted and played from other websites. This is a prototype created by HP Research with an index of over 15,000 hours of radio programming.
Singing Fish Singing Fish: An audio and video search engine finds Windows Media files, Real Player files, QuickTime files, mp3 files, and more. SingingFish targets nothing but multimedia.
TV Eyes TVEyes: TVEyes makes Radio & TV searchable by keyword, phrase or topic - just as you would use a search engine for text. TVEyes is the first company to deliver real-time TV and Radio search.
Veveo VTap  Veveo / VTap: a video search platform for mobile phones. Vtap is an offering from Veveo and it currently works on Apple Iphones as well as Microsoft Mobile-powered phones.
News
 Google News Google News: News by Google. Search and browse 4,500 news sources updated continuously.
MagPortal MagPortal: Find individual articles from many freely accessible magazines by browsing the categories or using the search engine. You can mark articles or find similar articles with several useful tools.
NewsLookup NewsLookup.com: Search thousands of news sites by source region and media type. News headlines updated continuously.
LexisNexis LexisNexis: Provider of legal, government, business and high-tech information sources. By subscription only.
Topix Topix is a news aggregator which categorizes news stories by topic and geography. It was created by the founders of the Open Directory Project. Knight Ridder, Tribune Company and Gannett own 75% of Topix.net.
Yahoo! News  Yahoo News: Use Yahoo! News to find breaking news, current events, the latest headlines, news photos, analysis & opinion on top stories, world, business, politics…
Open
Source
 DataparkSearch DataparkSearch Engine is a full-featured open source web-based search engine released under the GNU General Public License and designed to organize search within a website, group of websites, intranet or local system.
::egothor Egothor is an Open Source, high-performance, full-featured text search engine written entirely in Java. It can be configured as a standalone engine, metasearcher, peer-to-peer HUB, etc.
gonzui: gonzui is a source code search engine for accelerating open source software development - a source code search engine that covers vast quantities of open source codes available on the Internet.
Grub Grub started back in 2000 with a simple concept of distributing part of the search process pipeline: crawling. Their website claims, “We want to help fix search.”
/Dig ht://Dig is a complete world wide web indexing and searching system for a domain or intranet. ht://Dig is meant to cover the search needs for a single company, campus, or web site.
iSearch The iSearch PHP search engine allows you to build a searchable database for your web site. Visitors can search for key words and a list of any pages that match is returned to them.
Lucene Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. Full-text search & cross-platform. Apache Lucene is an open source project available for free download.
Lemur The Lemur Toolkit is a open-source toolkit designed to facilitate research in language modeling and information retrieval. Lemur supports a wide range of industrial and research language applications.
mnoGo mnoGoSearch: Web search engine software.
Namazu Namazu is a full-text search engine intended for easy use. Not only does it work as a small or medium scale Web search engine, but also as a personal search. (Namazu means “Catfish” in Japanese.)
Nutch Nutch is an effort to build an open source search engine based on Lucene Java for the search and index component. The fetcher (”robot” or “web crawler”) has been written from scratch solely for this project.
OpenFTS OpenFTS: OpenSource Full Text Search is an advanced PostgreSQL-based search engine that provides online indexing of data and relevance ranking for database searching.
SciencenetYacy Sciencenet: For scientific knowledge based on YaCy Technology. Current search engines are based on popularity and/or sponsored links. This makes it difficult for scientists/students/teachers. Sciencenet is the solution.
Sphinx Sphinx is a free software search engine designed with indexing database content in mind. It currently supports MySQL and PostgreSQL natively. It is distributed under the terms of the GNU General Public License v2.
SWISH-E SWISH-Enhanced (Simple Web Indexing System for Humans - Enhanced) is a fast, powerful, flexible, free, and easy to use system for indexing collections of Web pages or other text files.
Terrier Terrier is software for the rapid development of Web, intranet and desktop search engines.A modular platform for the rapid development of large-scale Information Retrieval applications.
Wikia Search Wikia Search: Jimmy Wales and Wikia aim to create a an open source Internet search engine, to which the community can contribute.
Xapian Xapian is an Open Source Search Engine Library, released under the GPL. It’s written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C# and Ruby (so far!)
Yacy YaCy is a scalable personal web crawler and web search engine. One YaCy installation can store more than 10 million documents, but in a community of search peers YaCy can provide a search index of unlimited size.
Zettair  Zettair is a compact and fast text search engine designed and written by the Search Engine Group at RMIT University. It was formerly known as Lucy.
People
 AnyWho AnyWho.com - Part of AT&T, mostly a telephone directory and reverse phone number directory.
Ex.plode.us Ex.plode.us: Explode is an easy way to find friends and those with common interests, no matter what social network or service they use.
infospace InfoSpace: From their webpage, “The yellow pages and white pages directory from InfoSpace is the most convenient way to find people and businesses.”
Linked In LinkedIn is a business-oriented social networking site used for professional networking. As of March 2008, it had more than 20 million registered users. An easy way to search for business people or professionals.
Spock Spock advertises itself as, “The world’s most accurate people search. Sign up to find people you know.”
Wink Wink is a free people search engine that helps you find people at social networks, blogs, and across the Web.
ZABASEARCH Zabasearch: Honestly free people search. All US postal addresses & telephone numbers revealed free. 3-times more listings than white pages phone directory.
ZoomInfo  ZoomInfo: Founded in 1999, ZoomInfo is a Web-based service that extracts information about people and companies from millions of published resources.
Question
&
Answer
 About.com About.com. The majority of their results come from their own site.  Used to be miningco.com.
Answers.com Answers.com offers free access to millions of topics from the world’s leading publishers.
Ask.com Ask Jeeves was designed to allow users to get answers to questions posed in everyday, natural language. Ask.com was the first such commercial question-answering search engine for the Web.
AskMeNow AskMeNow: Questions answered fr