DNNPiwik is a module for DotNetNuke that allows you to easily integrate the Piwik analytics tracking script in any page, choosing which roles you don't want to track (tipically Administrators).
DNNPiwik is free and distributed with source code. Download it from this page.
Configuration is very easy: type your Piwik Site ID in "Piwik Site ID", and the URL (withour protocol information!) in "Piwik Host". Optionally select roles you do not want to track.
RadEditor - please enable JavaScript to use the rich text editor.