Piwik aims to be the open source alternative to Google Analytics, and it's gaining fast. Piwik runs on PHP and MySQL; provides a drag-and-drop, widget-driven AJAX dashboard; allows you to track any number of Web sites; and supports multiple user accounts with basic access controls. Plug-ins are available for geolocation and to automate the insertion of Piwik JavaScript code into the pages of Drupal, Joomla, WordPress, and other publishing platforms.
Call ‘em cool, but don’t call ‘em open. DimDim has gone the proprietary SaaS route.
The last source code published (v4.5) was nine months ago, which effectively shut out potential contributors and user/promoters. They’re now touting v5.1. Why would anyone contribute bug patches or new features to an old version?