Sonar offers reporting capabilities on project quality and metrics in the form of a plugin. It aggregates project dashboard information in a presentable and readable format inside a PDF document.
The plugin, developed by Antonio Martin Muniz Martin, requires Sonar Version 2.4 or higher. To get some insight about the plugin's development, you can visit Martin's blog at http://blog.klicap.es/en/products/sonarpdfreportplugin.
Have a look at some of the more advanced features available in the commercial version of the plugin. Sonar includes the limited but still very valuable open source version.
Log in to Sonar with administrator privileges, click on Configuration and then Update Center ...