Dogpile
Parallel searcher that queries a customizable list of search engines and the Open Directory, then displays results from each search source in a separate section of the stream. Permits phrase-searches. http://www.dogpile.com/
Ixquick
Searches the web, MP3s and news archives. Finds sites rated best by multiple engines for your search. Regular, boolean and natural language searching. http://www.ixquick.com/
ProFusion
Customizable metasearch tool. Select from a list of search engines or let ProFusion choose the fastest. There are specialized metasearch pages for a huge number of topics. http://www.profusion.com
Pandia
Per and Susanne Koch's comprehensive guide to Web searching and search engine optimization, with tutorials, news, tools, reviews and SE marketing resources. http://www.pandia.com/