Most important websites

English

Google

Wikipedia

Facebook

Youtube

EBay

Amazon.com

Twitter

Blogspot.com

Bing

Linkedin

Yahoo

Flickr

Myspace

Pinterest

Digg

Wordpress.org

Alexa

Jokes.com

About.com

Monster.com

Craiglist.com

Fotolia

Grooveshark.com

Amazon.de

Mashable.com

Time magazine

The New York Times

Slate.com

Bbc.com

Download.com

CNN

ITunes

Bartleby.com

Outlook.com

Gmail.com

IMDb

Scientificamerican.com

Skype.com

Nutrition.gov

Google Translate

Wordreference.com

Reference.com

Google maps

Answers.com

Cnet.com

Beliefnet.com

Google groups

Forbes.com

Nature.com

Epinions.com

Gutenberg.org

Stumbleupon.com

Vimeo.com

Tumblr.com

Dmoz.org

Online Books

Pogo.com

Refdesk.com

Ipl.org

Mayoclinic.com

Expedia.com

London review of books

Rottentomatoes.com

Lifehacker.com

Paypal

Italian

Repubblica.it

Dagospia.com

Huffingtonpost.it

News.google.it

German

Test.de

News.google.de

French

News.google.fr

Spanish

News.google.es

Appendix

100bestwebsites.org

Top 500 (seomoz.org)