SimilarSites - Discover the Best Websites and Their Alternatives!

NOTES: I've found this utility very useful when I'm searching or researching something. The service has really been improved over time and it's worth a look. I've found a ton of new websites that I didn't even know existed and I would call it more of a research site than an "alternate-to" site. Several of my friends have found this tool to be quite invaluable. See for yourself and decide.

Link and description from the site:

http://www.similarsites.com/

Stop Searching, and Start Discovering

The quality of your Internet usage experience is limited by the quality of the websites you visit. With all of the sites on the net, it is easy to find yourself on sites which add nothing to this experience. Instead, valuable time gets wasted, and little of value gets accomplished.
SimilarSites.com helps improve your Internet usage experience by presenting you with the websites that you want to see. This is accomplished through the use of our proprietary similar websites algorithm. Years of research and development have been invested into its development, and the results are truly amazing.
Whether you are using SimilarSites.com through our website, or through our Website Plugins, the results will never cease to amaze you. Give it a try today, and see for yourself.