SI Web Tree is a PHP based tree navigation script. It can be used within framed or non-framed sites. With the exception of a rollover script, the tree is completely server-side controlled. The script works with any browser.
Most scripts are free or open source. But some have the full source code available for download yet itīs required to have permission to use them and most often the price will be listed. If there is a script license e.g. GNU or GPL then it will also be listed.