General Engines

Ask.com

Search the web with a quick keyword search, or use Ask.com's advanced tools to search for specific kinds of content, such as images, mobile applications, and content for kids.

exalead.com

Web search results are presented sorted by category, website location, language, file type, and related terms.

Google

Or search a subset of Google's content like Google U.S. Government.

Vivisimo

Web results clustered

Yahoo!

Specialized Engines

iBoogie

Customizable search engine that clusters your results.

KartOO

Visualized search results with maps and previews.

FirstGov

The U.S. government's official web portal. Search millions of web pages from federal and state governments, the District of Columbia and U.S. territories.

Grokker

Visualized search results from Yahoo!, Wikipedia and Amazon.

scirus

For scientific information only - searches web and journal content.

Search Engine Colossus

International directory of search engines.

Technorati

Search engine for blog postings.

Comparative Engines

Dogpile

Search multiple engines at once.

jux2

Search and compare results from Google, Yahoo! and MSN.

Thumbshots

Graphical representation of results(with thumbshots!) from two search engines. Works in IE.