The rumored-but-rarely-talked-about topic of the “deep web”. A web underneath the web, filled with petabytes of data and information that’s out of the reach of your standard Google, Bing, or Yahoo search bar.

Rated links to ftp and mp3 search sites.

Search forms for the most effective engines in dozens of categories from Robert Skelton. Includes reviews, ratings, webmaster tools, and tutorials.

Find the search engine you want by selecting a thematical category and/or country, or search by keyword.

News on the search engine industry continually updated from thousands of sources around the Net.

Bruce Clay's pictorial view of how search engines provide data to partner engines and directories.

List of search engines and directories. Also includes a metasearch engine, search tutorial, and a free newsletter.

Search engines sorted by geographical location.

A directory of search engines: general, metasearch, pay-per-click, children's, subject, country and people search. All are described and can be rated.

A directory of directories. Links to selected information rich web resources, both unspecialised and specialised, with a strong emphasis on United Kingdom based sites.