hitSecureFiles allows you to add a client-only downloads area to your website. Let your users register at your site, organize them into groups and control the customizable role-based group access to hierachical security zones - from viewers to uploaders. The application fully integrates into virtually any PHP page on your site with only 2 file includes, inheriting your site look and feel.
As the site admin you can configure to get email notifications on most actions like user register or file download. Send newsletters to user groups or emails to individual customers. hitSecureFiles may be integrated to share user accounts from other applications.