aiSee reads a textual, easy-to-read, and easy-to-learn graph specification and automatically calculates a customizable graph layout. This layout is then displayed, and can be printed or interactively explored. aiSee features 15 basic graph layout algorithms (including force-directed layout), recursive subgraph nesting, fish-eye views, and an animation interface. It has been optimized to handle huge graphs automatically generated by applications (e.g. compilers).
Apache2GDL is a Perl script that parses an Apache log file and generates a directed graph of visitors' movement in GDL format for visualization with aiSee. It also allows you to pipe the graph directly through aiSee and get a mapped SVG or PNG image of the layout. The generated images help you find out how people actually browse your site -- which paths they take to get from page A to page B, which paths are more popular than others, which pages get the most hits, and whether there are one-way paths and dead-end pages.