Google
google.com Enables users to search the Web, Usenet, and images. Features include PageRank, caching and translation of results, and an option to find similar pages. The company’s focus is developing search

Facebook
facebook.com A social utility that connects people, to keep up with friends, upload photos, share links and videos.

YouTube – Broadcast yourself
youtube.com YouTube is a way to get your videos to the people who matter to you. Upload, tag and share your videos worldwide!

Yahoo!
yahoo.com Personalized content and search options. Chatrooms, free e-mail, clubs, and pager.

Windows Live
live.com Search engine from Microsoft.

Baidu.com
baidu.com The leading Chinese language search engine, provides “simple and reliable” search experience, strong in Chinese language and multi-media content including MP3 music and movies, the first to offer WAP and PDA-based mobile search in China.

Wikipedia
wikipedia.org An online collaborative encyclopedia.

Blogger.com
blogger.com Free, automated weblog publishing tool that sends updates to a site via FTP.

Twitter
twitter.com Social networking and microblogging service utilising instant messaging, SMS or a web interface.

MSN
msn.com Portal for shopping, news and money, e-mail, search, and chat.

El resto es historia y puedes verlo en http://www.alexa.com/topsites aunque muchos no confian en los datos que provee esta empresa, pero bueno cada quien tiene su top asi que esto puede cambiar en cualquier momento.

A disfrutar de la web con mucho ritmo.