http://www.wolframalpha.com/
http://www.sweetsearch.com/
http://answers.askkids.com/
http://www.refseek.com/
http://www.qwiki.com/
http://vionto.com/show/
http://www.similarsites.com/
http://simple.wikipedia.org/wiki/Main_Page
http://www.citethisforme.com/website
