Sampling of notable sites

From Alexa Top 500

1. google.com
2. facebook.com
3. yahoo.com
4. youtube.com
5. live.com
6. wikipedia.org
7. blogger.com
8. baidu.com
9. msn.com
10. qq.com
11. yahoo.co.jp
12. twitter.com
13. google.co.in
14. sina.com.cn
15. google.cn
16. google.de
17. wordpress.com
18. myspace.com
19. microsoft.com
20. google.co.uk

Honorable mentions

• amazon.com
• bing.com
• ebay.com
• linkedin.com
• flickr.com
• craigslist.com
• cnn.com
• orkut.com
• nytimes.com

HTML5 notables

• apache.org
• apple.com
• adobe.com
• chromium.com
• ibm.com
• mozilla.org
• opera.com
• w3.org
• webkit.org
• whatwg.org