- Ask Jeeves - Ask Jeeves is a search engine that searches a knowledge base of answers, as well as websites. Allows natural language searches.
- Metacrawler - Includes the following search engines: Google, Yahoo, Ask Jeeves, About, LookSmart, Teoma, Overture, and FindWhat.
- Query Server - General, Financial, Federal, Health & Medicine; operators, truncations; Results Clustering: content, site, or both
- SurfWax - Ranks results by relevance, source, and alphabetically. A nice feature of SurfWax is FocusWords which suggests alternative keywords.
- Vivisimo - Clusters results into meaningful groups.
Read Guide to Meta-Search Engines for more information
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