CSV AdStats Adsense Tool
http://www.nix.fr/en/csvadstats.aspx
CSV AdStats is an application that allows you to analyze the CSV formatted logfiles that are made available for Google AdSense. The tool calculates valuable statistical information like CPM, number of clicks, moving averages, accumulated by period and much more.
Runs on Microsoft Windows and requires the Microsoft .NET 1.1 Framework installed.