Can you create a view to display all files within a certain directory?
Only tools I've seen dealing with showing file are more like this...

http://drupal.org/project/elfinder

http://drupal.org/project/webfm

http://drupal.org/project/manager

http://drupal.org/project/filebrowser

You can create a view of all attachments to nodes, but that's not what you want either.