Here is two pages which will discuss about tools which will help a Google adsense user in many ways.
1. Quick Online tips - Google Adsense Tips and Tools Collection - In this page there are some tools and some tips also which will help myou to earn more from your sites.
2. Official UpHook Blog: Website Revenue For Extra Income – This is having 10 useful tools. It is a great list.
Both will be a worth visit.