Joomla! Components
FlexBanners is the powerful banner advert management system from Inch Hosting! You can also restrict banners to particular articles, categories or sections, as well as all the default Joomla restrictions (using the itemid system). It also works well with Google AdSense code - copy the Google code into the custom code box, and it just works!
FlexBanner also works with Joomfish allowing you to specify different banners for different languages.
The full user guide is available here: FlexBanner Guide courtesy of Ian and his site