I wanted to find some nice alternative to Distrowatch in order to check some distro's popularity. I found some nice google tools:

# Google's AdPlanner (site profile)

https://www.google.com/adplanner/site_profile

This one seems pretty clear and offers a lot of info on the website. Obviously, all this according to Google.

# Google Insights (search)

http://www.google.com/insights/search/

Also according to Google. A nice way to compare search terms.

It was cool to look for some websites like: fedoraproject.org, ubuntu.com, jamendo.com, etc. I really recommend you take a look at these.