综合类搜索引擎及目录索引

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元搜索引擎 Meta Search：

"Top Choices" granted by Search Engine Watch (as of Sep. 2002):

Flipper - Meta search engine that not only displays results from other search engines and from the Open Directory, but from sites that are part of the invisible web, as well. Most of these deep web sites are commercially oriented, but there are also useful information sites for things like music and films.

iBoogie - Allows you to select results from the web, products or services from the "BuyWeb," or limit your queries to the deep web, images, video or audio. It also performs real-time clustering of results, creating a list of categories related to your search terms for easy browsing.

InfoGrid - In a compact format, InfoGrid provides direct links to major search sites and topical web sites in different categories. Meta search and news searching is also offered.

Infonetware RealTerm Search - primarily designed to demonstrate classification technology from Infogistics. It's a meta search engine, and it does topical classification of results. However, it is unique in that you can select several different topics, then "drill down" to see results from all of them, rather than being restricted to the results from only one topic.

Ithaki Metasearch - Metasearch the most relevant engines by topic: web directories, web search engines, mp3s, multimedia, news, and many more; probably the most "global" of all meta search engines, available in 14 languages and offering more than 35 different categories for limiting your search. In addition, Ithaki offers country specific search,querying only local search engines rather than the regional versions of the major search engines.

Ixquick - Meta search engine that ranks results based on the number of "top 10" rankings a site receives from the various search engines.

Kartoo - If you like the idea of seeing your web results visually, this meta search site shows the results with sites being interconnected by keywords. It also presents a thematic map that shows the most important sites and the linkage relationships among the various results.

ProFusion - Brings back listings from several major search engines as well as "Invisible Web" resources. Formerly based at the University of Kansas, the site was purchased by search company Intelliseek in April 2000.

qbSearch - Want to get multiple pages of results from a search engine combined into one single page? QB-Search will quickly join up to 200 pages of listings from major search engines.

Query Server - Search against major web-wide search engines, as well as major news, health, money and government search services.

SearchOnline - Relatively new service, but one that offers a highly flexible and customizable interface to a wide variety of information sources, ranging from general web results to specialized search resources in a number of subject specific categories.

SurfWax - Searches against major engines or provides those who open free accounts the ability to chose from a list of hundreds. Using the "SiteSnaps" feature, you can preview any page in the results and see where your terms appear in the document. Allows results or documents to be saved for future use.

Vivisimo - Provides an innovative document clustering technology that acts as a metasearch engine. It transforms search engine outputs from long, tedious lists into crisply organized categories.

"Popular Choices" granted by Search Engine Watch (as of Sep. 2002):

Dogpile -Popular metasearch site that sends a search to a customizable list of search engines, directories and specialty search sites, then displays results from each search engine individually. Owned by InfoSpace, which also owns MetaCrawler.

Excite - Formerly a crawler based search engine with its own index, it was transformed into a meta search engine when purchased by InfoSpace in 2001.

MetaCrawler - One of the oldest meta search services, MetaCrawler began in July 1995 at the University of Washington. MetaCrawler was purchased by InfoSpace, an online content provider, in Feb. 97. Queries other search engines, organizes results into a uniform format, ranks them by relevance, and returns them to the user.

Webcrawler - Formerly a crawler based search engine using a much smaller subset of the Excite index, it was transformed into a meta search engine when purchased by InfoSpace in 2001.

Mamma.com - An unusual meta search engine in that it only searches a few major indexes -- the rest of the sites queried are directories or paid-placement services.

Search.com - a meta search engine operated by CNET. It offers both web-wide search and a wide variety of specialty search options. Search.com uses technology from SavvySearch, which was acquired by CNET in October 1999. The SavvySearch site itself no longer operates. SavvySearch was one of the older metasearch services, around since May 1995 and formerly based at Colorado State University.

Other Meta Search Engines:

InfoSpace - Delivers highly relevant results from a variety of different search engines and directories including Inktomi, GoTo, and the Open Directory.pop

RedeSearch - Searches the top search engines with one click and removes duplicates. pop
1Blink.com - All in one metasearch engine.

2Trom - Metasearch engine with free email, cool looks, latest news, sports, entertainment, and more.

37.com - Meta search engine.

All4one Search Machine - Meta search 4 popular search engines and directories simultaneously.

AllDeal.Com - A meta search engine which also provides a manually indexed directory of listings. Sites manually indexing to ensure quality and accuracy. Provides free email.

Alfaseek - Searches multiple search engines from all around the world by region or by topic.

Better Brain - Search 11 major search engines at once, search MP3 music, newsgroups or browse the open directory.

C4 - Parallel searching provides you with the ability to search more than one database at a time, while returning only the most relevant search results.

Datahit - Meta search engine.

Debriefing - Meta search engine that uses top search engines to display a sorted list of relevant search results.

DutchBunch.com - Meta search engine.

FreezerSearch - Meta search engine using Personalized Dyanamicism and Inferred Logic.

Genieknows.com - Meta crawler with relevance enhancement.

Highway 61 - A metasearch site.

Infonesia.Net - Meta search engine and web directory. Provides the latest tech news, free email, access to POP email and more.

internav - Search many different search engines at one time. Look up words in the dictionary or thesaurus. Free voice chat, portable email, and more.

MegaCrawler - Meta search engine.

Metabear - Provides meta search of world search engines, Russian search engines, and meta search of FTP sites.

Metafetcher - Meta search engine which searches a maximum of 10 search engines at one time.

MetaFind - A multi engine parallel search interface automatically searches 20 plus search engines 3 at a time. Allows for continued searching options and Boolean/proximity operators.

MetaGopher - Meta search engine. Results are combined from major search engines and delivered to your browser in a simple format.

Metahoo! - Web portal offering a directory, a meta search engine, daily news, free email and other community features.

MetaMonster - Meta search engine which searches a number of search engines in many languages.

Monster Crawler - Meta search engine which allows a simultaneous multi-thread search of all the major engines with just one click.

Multimeta - Metasearch in several international and German search engines.

myGO - Meta search engine that allows you to search the web, audio files, pictures and more.

myMetaSearch.com - Meta search engine which simultaneously searches the top web resources in 14 categories.

Net Power Search - Meta search engine accessing multiple search engines with each search. Provides advertisers pay for placement system of advertising.

net2day - A fully parallel search engine that searches multiple sources at once, then displays results by relevance.

NetFinder USA - Meta search engine and web site directory. Also provides news, weather, message boards, and more.

NoImages.Com - Meta search engine which provides fast searching with no images to slow down results.

Nominator - Meta search which accesses dozens of information systems simultaneously, incorporating results from major search engines.

One2seek - Meta search engine.

OneCenter

PopularSites.com - Multi-search and top sites directory. Find the web's most popular sites, sites ranked by traffic, metasearch engine and more.

Realinks - Meta search engine.

Searchhawk.com - Meta search engine.

Searchling - Java powered meta search engine.

See-Search - Metasearch site with web search and a variety of other search tools including MP3, WAP, ISP search and more.

SeekAmerica.com - Meta search engine for North and South America.

Seekinall - Meta search engine that delivers fast results in a clean layout.

SETI-search - Meta search engine which is speech friendly to disabled users employing assistive technology to interface with the Web.

Spiderengine - Meta search engine.

StartIt.Com - Meta search engine and directory. Provides free email and comics.

Surf2It - Search the top search engines, also search for audio, MP3s, news, pictures and video.

TECHscape Search - Meta search engine that crawls search engines, news, auctions, MP3 sites and country search.

Turbo10 - Meta search engine.

WebInfoSearch - Meta-crawler which searches the top search sites.

What-u-seek

zInternet.com - Meta search engine.