URLR*TE is a free web-based service that helps you check your URL Ratings. You are provided with details like your domain age, current PageRank, number of inbound links, Alexa Traffic rankings and a site value report that gives you the monetary equivalent worth of your URL.
You can also check the Leaderboards that include top-ranked websites, recently-ranked,most-ranked URLs on URL Rate, URLs with top Alexa rankings. There is an interesting list that shows the oldest domains with their age in number of years.
Some important features:
- Find the URL ratings of any domain.
- Check the domain age, traffic ranks, number of links and monetary worth of a URL.
- A Leaderboard to check the top 10 ranks according to various parameters.
- Free.
Check out URLR*TE @ URLR*TE.com
Ankur Jain is a Software Engineer in Test Automation. After a 5 years stint with Accenture and Oracle, he started his eLearning company. A long-time blogger and proud owner of the "Learn" series of websites. 
Thanks. Its really useful.