Yippy
Yippy
Yippy (formerly Clusty) is a metasearch engine developed by Vivísimo which offers clusters of results.

Clusty was developed by Vivísimo. Vivísimo is a company built on Web search technology developed by Carnegie Mellon University researchers, much like Lycos was a decade earlier. Clusty added new features and a new interface to the previous Vivísimo clustering web metasearch. Different tabs also offer metasearches for news, jobs (in partnership with Indeed.com), U.S. government info and blogs. Customized tabs allow users to select sources for their own metasearch to create personalized tabs.
Reference
Wikipedia
Search Engines
Bing
blekko
DuckDuckGo
Google Search
ixquick
Wolfram Alpha
Yahoo!
Yippy