nuckel

You need a small FTP server, but you have only a webserver with PHP? You don't wanna setup a Rapidshare clone but only a single upload/download page for a handful authorized users? You don't want or have a database?

Then have a look at Nuckel. It comes as a single PHP file that only needs write access to the file system. It allows you to push/pull files through a simple web interface. It uses straightforward URLs.

Note that Nuckel is not a web based filemanager for the server's file system, it merely stores the uploaded files in a git-like manner.

BTW., "Nuckel" is german for a dummy or a baby bottle's teat, i.e. something to suck on gently.