PHPfileNavigator is a state-of-the-art, open source web based application to complete manage your files and folders.

phpWebFileManager is a standard Web File Manager written in PHP4. It its purely written only with PHP and HTML--no JavaScript and no database for maximum compatibility.

Olate Download 3 allows you to add a downloads area to your website and control every aspect of it through an admin control panel. Features include automated installation with PHP4 and PHP5 support, a full templating system, unlimited categories and files

File Thingie is a small file manager intended for those who need to give out access to a small part of their file system, but don't want to hand out FTP passwords.