http://www.alexa.com/
- analyzes site traffic including ranking, global users, pages linking to the site, and links to related pages of interest.
http://blekko.com/
- retrieves results from trustworthy sites and offers filtered searching with the use of slash tags, e.g., global warming /climate; can sort results by relevance or date; allows searchers to integrate their Facebook newsfeed into search results..
ChaCha
http://www.chacha.com
- offers live human guides to help answer queries; focuses on questions from mobile devices.
Factbites
http://www.factbites.com
- searches for full topic matches and returns meaningful, full sentence excerpts of sites in its results list.
Lycos
http://www.lycos.com
- general search engine that also offers searches of a few deep Web content sources including people look-up, yellow pages, and multimedia
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