http://www.howstuffworks.com/
http://encarta.msn.com/encnet/features/dictionary/dictionaryhome.aspx
http://refdesk.com/
http://download.cnet.com/windows/
http://novelguide.com/
http://math.com/
http://www.freetranslation.com/
http://www.shakespeareonline.com/
http://sciencemadesimple.com/
http://www.thinkquest.org/en/
http://softpedia.com/
http://www.education.com/dari indonesia:
http://rumahpengetahuan.web.id/
http://www.visigraphic.com/category/tag/tukar-ilmu-pengetahuan
http://www.edu2000.org/portal/
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http://bse.depdiknas.go.id/
http://www.gurumuda.com/
