Go2Net / MetaCrawler
MetaCrawler now powers searches at the Go2Net portal site.

SavvySearch
Searches up to 12 engines including: Lycos, WebCrawler, Google, All The Web, Thunderstone, Infoseek, Direct Hit, HotBot, Excite, Galaxy, AltaVista, NationalDirectory and Usenet.

Dogpile
Popular metasearch site that sends a search to a customizable list of search engines, directories and specialty search sites.

Inference Find
An alternative to typical metacrawlers, Inference lists results grouped by subject, rather than by search engine or in one giant list.

Ixquick Metasearch
Searches 14 engines. Results ranked by relevancy and includes information on which search engine it came from.

ProFusion
Searches the most popular search engines.

Mamma
Sends search requests to major search services.

InfoZoid
Searches 8 engines quickly. Listings are average in relevancy, shown as one long easy to scroll page.

The Big Hub
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 TotalSearch Technology
Meta search against several major search engines, with a nice, clean interface.

MetaGopher
Search 10 search engines including Yahoo, Excite, Infoseek, Webcrawler, Hotbot, Altavista, Lycos, and Magellan. and or channels.

RedeSearch
Fast comprehensive search of ten popular search engines.

BigHub
Simultaneous searches eight popular search engines, directories, review sites, usenet, and more.

SurfWax.com
Searches the major search engines, removes duplicate results, provides detailed page summaries.