Google AdSense Tools by Online

Contextual Ads Preview/Comparison Tool
This comparison tools comes in handy when you compare AdSense ads to those of other advertisement services (Chitika, Yahoo). You also have the ability to customize the colors and view what ads a certain URL would be likely to display.

Google AdSense Calculator
This AdSense Calculator is designed to help you to predict changes in your earnings depending on improvement (or deterioration) of Page Impressions, Click Through Rate and Cost Per Click. You can download further calculators here.

WordTracker
During the search, people use different keywords. Using this tool, you can find the most effective words before deciding what content to include on your page. Not free, but the free trial is available.

Traffic Estimator Sandbox
To use this tool, you need an AdWords account. This traffic estimator helps you to figure out what keywords result in the highest paying AdSense ads (more details on uphook).

Pubmatic
While Pubmatic isn’t strictly an AdSense tool, it will definitely help you earn more money from your website by optimizing your ads. With each page view, Pubmatic determines whether showing an AdSense ad or an ad from a different network would be best, based on the CPM.

AlterNut Ad
Instead of earning nothing from the PSA ads that Google fills the page with when it has no ads to show, earn a set fee by giving AlterNut Ad your unused PSA ads.