1. Delicious.com
2. Mix.com
3. Diggo.com
4. Buzzster.com
5. Facebook.com
6. Twitter.com
7. Friendfreed.com
8. identi.ca
9. Googlebookmarks.com
10. bookmarks.yahoo.com
11. url.org
12. connotea.org
13. bestofindya.com
14. a1-webmarks.com
15. reddit.com
16. bizsugar.com
17. Digg.com
18. buzz.yahoo.com
19. Kaboodle.com
20. Designmoo.com