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User/File Management, downloadable files are session bound and .htaccess protected against hot-linking.
Users are not wp users. Files are displayed in a jQuery powered filetree.
Now with public download area, public downloads are not session bound.
You can even tell wp which subdirectory of the public folder should be used as root-directory.
Screenshots
user panel allows you to create, edit and delete users.
file panel allows you to upload files, create directories and delete them again.