Alta Vista
Lycos
About.com
Mamma
Ask Jeeves (a real language query site)
Metacrawler
Ditto (image only search)
Direct Hit
Teoma
Dogpile
United Press Photo Search
Google
Yahoo
Google Scholar (search academic resources)
Vivismo (uses 'result clustering')
HotBot
Infomine (University of California Organization Project)
Wisenut
The Internet Archive
Internet Search Engines
The Open Directory Project
Webcrawler