From Seo Wiki - Search Engine Optimization and Programming Languages
Piwik is an open source web analytics system written in PHP. Following the stable release of phpMyVisites v2.3, the development team announced future efforts would be directed to Piwik.
Major differences between phpMyVisites and Piwik:
- phpmyvisites: emails reports, PDF exports, multi-sites reports, translated into 30+ languages
- piwik: APIs, plugins, more visually appealing graphs, modular architecture, and better performance
On November 21, 2008, SourceForge.net announced the availability of Piwik as a hosted application for developers.