Transmogrify.pathsorter is a project mainly written in Python, it's free.
reorder items into tree sorted order creating parents and defaultpages as needed
If items are at the same level in a folder then they will be sorted based on a '_sortorder' key as given by transmogrify.webcrawler.
In addition
if an item doesn't exist for a given items parent it will be created. The _type key will be set to the first item in 'default_containers'.
if a container has a 'text' key then a default page will be created.
if item's name is in 'default_pages' and it's parent doesn't already have a defaultpage then the item will be set as the parents default page.