• Carrot Clustering Engine
  Clusters search results from several search engines (Google, Yahoo etc.) and sources.
  with clustering searchengine by 2 users
• Clusty the Clustering Engine
  Metasearcher that clusters results in a usefull way.
  with metasearch by 79 users
• Exalead
  Very good search engine that includes a tumbnail of the web pages in the list of results.
  with searchengine by 15 users
• Googlepedia :: Firefox Add-ons
  Shows you a relevant Wikipedia article along with your search results. Clicking links in the article will trigger new Google searches, making it a very useful research tool.
  with addon firefox google wikipedia by 3 users
• Ixquick Metasearch
  Metasearcher with an international flavour adjusted to various languages and countries.
  with metasearch
• Copernic Metasearch - Advanced Web Search
  From the makers of the Copernic search tools.
  with metasearch by 2 users
• Cuil
  Cuil (pronounced COOL) is a search engine that combines the largest Web index with content-based relevance methods, organized results, and complete user privacy. The company’s next generation approach to search is the result of proprietary breakthroughs in search architecture and ranking algorithms. Cuil derives its name from an old Irish word for knowledge.
  with searchengine by 31 users
• Gigablast
  with metasearch by 23 users
• OXYSEARCH
  Searches Google, Yahoo, Live and Ask.
  with metasearch

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