Paid search engines
The ones we use most are Google, Yahoo, Bing/MSN, Ask and some regional and/or language specific search engines. And now eBay also has a paid search component.
Of the social networking sites, we tend to us Facebook and Twitter most but the situation is constantly changing and depends on your regional focus.
AFS has experience of advertising or conducting paid search (not social networking usage) on these social media sites:

Communication
- Micro-blogging applications: Twitter
- Social networking: Facebook, Myspace, Bebo
Collaboration
- Social bookmarking: Delicious, StumbleUpon
- Social news: Digg, Reddit
Multimedia
- Photography: Flickr
- Video sharing: YouTube
Entertainment
- Virtual worlds: Second Life
- Game sharing: World of Warcraft
Of the paid social networking sites we are currently using General
- Ask.com (formerly Ask Jeeves)
- Baidu (Chinese)
- Bing (formerly MSN Search and Live Search)
- Cuil
- Duck Duck Go
- Kosmix
- Sogou (Chinese)
- Sohu (Chinese)
- Yahoo! Search
- Yandex (Russian)
- Yebol
Geographical limited scope
- Accoona, China/US
- Alleba, Philippines
- Ansearch, Australia/US/UK/NZ
- Daum, Korea
- Goo, Japan
- Guruji.com, India
- Leit.is, Iceland
- Maktoob, Arab World
- Onkosh, Arab World
- Miner.hu, Hungary
- Najdi.si, Slovenia
- Naver, Korea
- Rambler, Russia
- Rediff, India
- SAPO, Portugal/Angola/Cabo Verde/Mozambique
- Search.ch, Switzerland
- Sesam, Norway, Sweden
- Seznam, Czech Republic
- Walla!, Israel
- Yandex, Russia
- ZipLocal, Canada/US
Accountancy
Business
Education
- GetEducated.com (Online degree programs from the US)
Enterprise
See also: Enterprise search
- AskMeNow: S3 - Semantic Search Solution
- Concept Searching Limited: concept search products
- Dieselpoint: Search & Navigation
- dtSearch: dtSearch Engine(SDK), dtSearch Web
- Endeca: Information Access Platform
- Exalead: exalead one:enterprise
- Expert System S.p.A.: Cogito
- Fast Search & Transfer: Enterprise Search Platform (ESP), RetrievalWare (formerly Convera)
- Funnelback: Funnelback Search
- IBM: OmniFind Enterprise Edition
- ISYS Search Software: ISYS:web, ISYS:sdk
- Jumper 2.0: Universal search powered by Enterprise bookmarking
- Microsoft: SharePoint Search Services
- Northern Light
- Open Text: Hummingbird Search Server, Livelink Search
- Oracle Corporation: Secure Enterprise Search 10g
- SAP: TREX
- TeraText: TeraText Suite
- Vivisimo: Vivisimo Clustering Engine
- X1 Technologies : X1 Enterprise Search
- ZyLAB Technologies: ZyIMAGE Information Access Platform
Mobile/Handheld
- Taptu: taptu mobile/social search
Job
Main articles: Job search engine and Employment website
See also: Category:Job search engines
- Bixee.com (India)
- CareerBuilder.com (USA)
- Craigslist (by city)
- Dice.com (USA)
- Eluta.ca (Canada)
- Hotjobs.com (USA)
- Incruit (Korea)
- Indeed.com (USA)
- LinkUp.com (USA)
- Monster.com (USA), (India)
- SimplyHired.com (USA)
- Naukri.com (India)
Legal
Medical
- Bioinformatic Harvester
- Entrez (includes Pubmed)
- EB-eye EMBL-EBI's Search engine
- GenieKnows
- GoPubMed (knowledge-based: GO - GeneOntology and MeSH - Medical Subject Headings)
- Healia
- Searchmedica
- WebMD
- PubGene
- Nextbio (Life Science Search Engine)
- VADLO (Life Sciences Search Engine)
News
People
Real property
Television
Video Games
- GenieKnows
- Wazap (Japan)
By information type
Search engines dedicated to a specific kind of information
Forum
Blog
Multimedia
See also: Multimedia search
- Bing Videos
- blinkx
- FindSounds
- Google Video
- Munax's PlayAudioVideo
- Picsearch
- Pixsta
- Podscope
- ScienceStage
- Songza
- SeeqPod
- Veveo
- TinEye
- Yahoo! Video
- YouTube
Source code
BitTorrent
These search engines work across the BitTorrent protocol
Email
Maps
Price
- Google Product Search (formerly Froogle)
- Kelkoo
- MSN Shopping
- MySimon
- PriceGrabber
- PriceRunner
- PriceSCAN
- Shopping.com
- ShopWiki
- Shopzilla (also operates Bizrate)
- TheFind.com
- Wishabi
Question and answer
Human answers
Automatic answers
See also: Question answering
Natural language
See also: Natural language search engine and Semantic search
By model
Open source search engines
- DataparkSearch
- Egothor
- Grub
- Ht://dig
- Isearch
- Lucene
- Lemur Toolkit & Indri Search Engine
- mnoGoSearch
- Namazu
- Nutch
- OpenFTS
- Sciencenet (for scientific knowledge, based on YaCy technology)
- Sphinx
- SWISH-E
- Terrier Search Engine
- Wikia Search
- Xapian
- YaCy
- Zettair
Semantic browsing engines
Social search engines
See also: Social search, Relevance feedback, and Human search engine
- ChaCha Search
- Delver
- EarthFrisk.org
- Eurekster
- Mahalo.com
- OneRiot
- Rollyo
- Sproose
- Trexy
- Wikia search
- Wink provides web search by analyzing user contributions such as bookmarks and feedback
Metasearch engines
See also: Metasearch engine
- Brainboost
- ChunkIt!
- Clusty
- Dogpile
- Excite
- Harvester42
- HotBot
- Info.com
- Ixquick
- Kayak
- LeapFish
- Mamma
- Metacrawler
- MetaLib
- Mobissimo
- Myriad Search
- SideStep
- Turbo10
- WebCrawler
- DeeperWeb
Visual search engines
Search Appliances
- Google: Google Search Appliance
Communication
- Blogs: Blogger, LiveJournal, Open Diary, TypePad, WordPress, Vox, ExpressionEngine, Xanga
- Micro-blogging / Presence applications: FMyLife, Jaiku, Plurk, Twitter, Tumblr, Posterous, Yammer, Qaiku
- Social networking: Facebook, Geni.com, Hi5, LinkedIn, MySpace, Ning, Orkut, Skyrock, Qzone, Vkontakte, RenRen, Kaixin, ASmallWorld, studivz, Xing, RunAlong.se, Bebo, BigTent, Elgg, Hyves, Flirtomatic
- Social network aggregation: NutshellMail, FriendFeed,
- Events: Upcoming, Eventful, Meetup.com
Collaboration
- Wikis: Wikipedia, PBworks, Wetpaint
- Social bookmarking (or social tagging)[3]: Delicious, StumbleUpon, Google Reader, CiteULike
- Social news: Digg, Mixx, Reddit, NowPublic
Multimedia
- Photography and art sharing: deviantArt, Flickr, Photobucket, Picasa, SmugMug, Zooomr
- Video sharing: YouTube, Viddler, Vimeo, sevenload, Zideo
- Livecasting: Ustream.tv, Justin.tv, Stickam, Skype, OpenCU
- Music and audio sharing: MySpace Music, The Hype Machine, Last.fm, ccMixter, ShareTheMusic
- Presentation sharing: slideshare, scribd
Reviews and opinions
- Product reviews: epinions.com, MouthShut.com
- Business reviews: Customer Lobby, yelp.com
- Community Q&A: Yahoo! Answers, WikiAnswers, Askville, Google Answers
Entertainment
- Media and entertainment platforms: Cisco Eos
- Virtual worlds: Second Life, The Sims Online, Forterra
- Game sharing: Miniclip, Kongregate
