Below are especially well-known, well-used or long-established meta
search services.
Go2Net
/ MetaCrawler
http://www.go2net.com/
One of the oldest meta search services, MetaCrawler began in July
1995 at the University of Washington. MetaCrawler was purchased by
go2net, an online content provider, in Feb. 97. The commercial backing
has helped improve the responsiveness of the service. MetaCrawler now
powers searches at the Go2Net portal site. (more
about Go2Net)
SavvySearch
http://www.savvysearch.com/
Another one of the older metasearch services, around since May 1995
and formerly based at Colorado State University. It is highly
customizable and coveres a huge-range of general and specialty search
sites.
Search.com
http://www.search.com/
Search.com is 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.
Dogpile
http://www.dogpile.com/
Popular metasearch site that sends a search to a customizable list of
search engines, directories and specialty search sites. Dogpile also
runs the MetaFind metasearch site
that sends searches only to crawler-based search engines.
Inference
Find
http://www.infind.com/
An alternative to typical metacrawlers, Inference lists results
grouped by subject, rather than by search engine or in one giant list.
For example, a search for "Uma Thurman" groups results into "Uma
Thurman" and "Pulp Fiction," among other categories. It taps into Alta
Vista, Excite, Infoseek, Lycos, WebCrawler and Yahoo. The service began
in May 1995, moving to its present domain in Oct. 1996.
Ixquick
http://www.ixquick.com
Meta search engine that ranks results based on the number of "top 10"
rankings a site receives from the various search engines.
ProFusion
http://www.profusion.com/
Customizable, with broken link detection available. Formerly based at
the University of Kansas.
QuickBrowse

http://www.quickbrowse.com/
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 Yahoo, AltaVista, WebCrawler, Google or Go2Net's
MetaCrawler. It's a simple, helpful tool that you'll no doubt need at
some point. Another powerful offering is QB-Masterpage, which will
combine URLs that you select into a single page for quick browsing. Both
are available from QuickBrowse.
Mamma
http://www.mamma.com/
Sends search requests to major search services.
TeRespondo

http://www.terespondo.com
Spanish metacrawler that searches on the more popular search engines.
It also has a database of questions and answers that aid the user when
searching, similar to Ask Jeeves. Motor de busqueda que busca tu
consulta en los buscadores mas populares en espanol.
The
Big Hub
http://www.thebighub.com/
Allows you to search many major search engines or a huge number of
specialty sites, all from the same place. Formerly the Internet Sleuth.
C4
http://www.c4.com
C4 allows meta searching against several major search engines, with a
nice, clean interface.
SurfWax.com
http://www.surfwax.com
Searches the major search engines, removes duplicate results,
provides context highlighting, helps users focus search words, provides
detailed page summaries.