Most webmasters know about Alexa (www.alexa.com) - it has been around for years and provides information about traffic to websites based on a panel of several million Alexa toolbar users. Comparing the traffic on your sites with the traffic on other sites can be interesting.
But the marketplace of such free tools just to a big step forward. Last weekend, Alexa added new information to their traffic pages. They now give information about traffic by country, and even provide traffic rankings by country. Talk about relevant new information in the post UIGEA age.
And in the last few months there is an entirely new entrant into this marketplace. Quantcast (www.quantcast.com) provides an entirely new ranking system based on monitoring visitors to websites connecting through North American ISPs. This panel won't have some of the biases the Alexa panel has, and isn't as subject to visit fraud, but is limited to North America.
Let us know whether or not you use these sites, and what you think of them.
Michael