This plugin creates a javascript widget in your sidebar that shows ads to your site visitors based on what country they're in.

Manage your ads. Define under what condition they will show (visitor from search engine, old post..). Make more money.

AdSense Manager lets you manage your ads from within WordPress. With support for AdSense, AdBrite and many more.

WhyDoWork Adsense allows you to insert Adsense ads on your blog without modifying the template with a variety of useful options.

Plugin to display/insert Custom code (PHP, HTML, Javascript), announcements, Video's, adsense, affiliate/referrals on your blog's front page.