Advanced Google Search

Doesn't keep track of your preferences, but allows customization.

Microsoft search engine.

International interface of Yandex, a Russian competitor of Google.

Open Source Search Results Clustering Engine automatically organizes search results into thematic categories.

Find archived versions of websites.

Advanced interface of Yahoo search.

Tips on constructing searches in web search engines with an emphasis on recruiting / people searching. A collection of selected tools and custom search engines.

U.K.-based blog with tips on search tools and electronic resources for business information.

Business research tips from the University of Manchester library.