Google Scholar (http://scholar.google.com)

Indexes peer-reviewed online journals

Clusty (http://www.clusty.com)

A meta-search engine that clusters your results.

The meta-search engine that combines Google and Ask.com.

Kartoo (http://www.kartoo.com)

A visual meta-search engine that displays results in chart or classic list form.

Scirus (http://www.scirus.com)

The engine to use when searching the web for scientificinformation.

A metasearch engine with another way to look at results.

Answers questions directly by searching vast quantities ofdata rather than by searching web sites.Try this for math or statistics questions or problems.