Clicky Web Analytics gives bloggers and smaller web sites a more personal understanding of their visitors with its refreshingly clean and simple interface, innovative features, and unrivaled per visitor level of detail.
ClickHeat is a visual heatmap of clicks on a HTML page, showing hot and cold click zones. Requires Javascript on the client to track clicks, PHP and GD on the server to log clicks and generate the heatmap.
Quantcast is a new breed of measurement service helping buyers and sellers quantify the characteristics of digital audiences against which they can activate addressable advertising solutions.
Google Analytics makes it easy to improve your results online. Write better ads, strengthen your marketing initiatives, and create higher-converting websites. Google Analytics is free to all advertisers, publishers, and site owners.