Ask Jeeves
A natural language search engine which provides a list of related topics and ranks sponsored web sites at the top of the results page.

Beaucoup!
Provides access by category up to a claimed 2,500 search engines, catalogues and directories. Sponsored web sites are listed at the top of the results page.

Ixquick
Searches 12 search engines simultaneously including AllTheWeb, Ask Jeeves, Google, Yahoo. Results are ranked by relevance and quality, with number of hits for each search engine. Sponsored web sites are listed at the top of the results page.

Search Engines

(to locate Web pages that match your search term/s)

AltaVista UK
A full text index to over 30 million web pages and 13,000 news groups. Sponsored web sites are listed at the top of the results page.

Google
Results are ranked by number of references to them as well as by matching search term(s). Sponsored web sites are listed on the right-hand side of the results page.

Google Scholar

Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. Google Scholar helps you find relevant work across the world of scholarly research.