Real-Time Website Analytics: TraceWatch
TraceWatch is an open source and free website analytics application that works real-time.
With the help of an easy-to-use interface, the application has everything for making a deep analysis of websites (like visitors, pageviews, browsers, referrers, robots and much more).
TraceWatch offers private and/or public stats report pages (which is great for sharing the data).
The application is highly customizable and has a powerful admin menu that can control almost every aspect of it.
It is multilingual and requires PHP/MySQL + uploading few files to function.