Piwik
Piwik is an open source analytics package for your web sites.
Source for Piwik web-app is the great PHP-System itself found at http://piwik.org
Security
For piwik working correct, you have to edit the javascript-code it gives you by hand. Also, your hda has to be reachable from the websites you are tracking, like - if you want to track your website example.com, you need to forward HTTP-Traffic to your hda, regulary thats Port 80. Inside the javascript it gives you, you need to specify the url to your hda-piwik-installation then - like
http://example.yourhda.com/piwik
This may open a big security-hole for your system. So - if you're not familiar with firewalls and security like setting up .htaccess and .htpasswd for your hda, you should consider to install the piwik at an server outside your LAN.
Have a look :)
You're welcome to discuss about the Piwik-web-app for HDA here: http://forums.amahi.org/viewforum.php?f=26
[More to come...]