This unofficial Adsense test tool lets you test what Google Adsense Ads are most likely to be served on your pages.
Before you register in Google's Adsense program, you can benefit greatly from this free tool.
When you enter the url for your website or website pages, Google will serve Adsense Ads that it feels matches your content. You can use this information as an indication to how well you are targeting the content of your site.
Platform(s): Linux, Windows, FreeBSD, Mac OSX, Sun Solaris