DNS as a Search Engine: A Quantitative Evaluation
Ben Edelman evaluates DNS, Google, and RealNames for their respective accuracies in providing correct and relevant content. Research suggests that Google offers the highest accuracy. (June, 2002)

How to Choose a Search Engine or Directory
University librarian Laura Cohen gives advice in the format of "if you want A then choose B."

InFoPeople: Best Search Tools Chart
Comparison of selected search engines and directories by content and features.

PPC-Search Engines
Publishes articles and news about pay per click search engines.

Search Engines for the World Wide Web: A Comparative Study and Evaluation Methodology
Comparison of AltaVista, Excite, and Lycos. (October 19, 1996)

SEOSurvey: MSN's Beta Search vs. Yahoo! and Google
An analysis of the search results for four sample searches. (November, 2004)

The Search Lounge
Contains reviews, interviews, and articles about the search engine industry with a focus on relevancy by Chris Fillius.

Tool Kit for the Expert Web Searcher
Recommendations from the Library and Information Technology Association about which Web resources are most effective in producing authoritative results for information-seekers.