• Google.
• Bing – Acquired Powerset.
• Yahoo – Acquired AltaVista, Inktomi, AlltheWeb.
• Blekko – A newcomer that allows one to “slash” search results, creating a “better” web.
• DuckDuckGo.
• Yebol.
• YaCy – A distributed, free, open source, peer-to-peer search engine.
• Faroo – A distributed, peer-to-peer search engine, it is not open source.
• Ask – Formerly known as Ask Jeeves!, it distinguished itself initially by having humans assist in providing the best search results.
• SearchHippo.
• Zakta – A social search engine with a lot of promise, but it appears to be stalling out as focus is placed on SearchTeam.
• ScrubTheWeb.
• Gigablast.
• Entireweb.
• ixquick.
• Exalead Search.
• Wolfram Alpha.
• SearchTeam – Social search engine by the team that developed Zakta. I prefer Zakta.
• ExactSeek – Created by the old-timer, Jayde Online Network.
• Hakia – Uses natural language processes.
• Amfibi.

Metasearch

• Dogpile – One of the senior citizens of the internet community, searches Google, Yahoo, and Bing.
• WebCrawler – Covers Google, Yahoo, and Bing.
• Mamma – Another of the web’s senior citizens.