Very complete Google Analytics plugin with easy authentication and lots of other features. Developer Joost de Valk provides tutorials and releases very frequent updates expanding the plugin.

Track your WordPress site easily and with lots of metadata: views per author & category, automatic tracking of outbound clicks and pageviews.

The Asynchronous Google Analytics for WordPress plugin is Google Analytics plugin that support new asynchronous tracking method. Give a better handle to integrate Google Analytics javascript code snippet into any WordPress websites/blogs. Simple yet and easy to configure, faster loading page with optimizing javascript asynchronous method, even for complex and specified custom tracking. Custom tracking for specified categories, tags, pages, posts, URL, or visitor from specified IP.