Anyone know any good backend user online file manager? [closed]

I'm looking for a backend system where your clients can login and upload files to your server, download files from the server and you can delete the users, create users, etc. I do not know the proper name for this kind of software. Maybe its called online file manager? Any recommendations? My server supports PHP, apache and mysq.

I tested Mollify (PHP-based) and found it to be quite good.

Shameless plug: I once created myftphp. it's a file manager written in php, which manages several users in distinct home directories. maybe you can give it a shot