Pathalizer
From Arnout Engelen
Where most other logfile analysis tools basically just count hits, pathalizer tries to visualize *how* people are visiting your site: it creates a graphical overview of the paths most people take though the site.
In short, pathalizer generates a directed, weighed graph from an apache log (but it's easy to modify the first part of the process to use pathalizer for lists of other events). http://pathalizer.sf.net
I should really get a polished release out.
A more modern term for 'path analysis', today, is 'clickstream analysis'.
Pathalizer was used in scientific research: http://portal.acm.org/citation.cfm?id=1235979 (Implicit measures of lostness and success in web navigation).
[edit] Web interface
Although Pathalizer itself predates `Web 2.0', a nice web front-end it could certainly turn it into an attractive `Web2.0'-application in the style of Goolge Analytics, to which a pathalizer-like graph view would be a nice addition.
[edit] Graph representation
The `main thing', of course, is getting the generated graph attractively on the screen. Graphviz can output to some interesting formats like SVG and PNG, but it would be really nice to make the layout (and perhaps even browsing/filtering) interactive.
I haven't found many suitable libraries for this yet though: most importantly, most libraries seem to use straight lines between all graph nodes. Curved linkes, like graphviz provides, would be much better.
For now, maybe tweaking the graphviz configuration to get some more attractive graphs would be sufficient.
