How can I offer files and folders on a web page for everybody with access policies? For my company I had to look for exactly this. We have technical guides for engineers and solution drawings for sales people and we wanted to share this with everyone, even our guy is on the customer side. The easiest thing as usual is a web interface. Imagine you enter a URL, provide name and password and you feel like browsing in the Windows Explorer. You can rename, move, delete, edit and open them with a very nice guy and this for free? Open Source projects are my favorite and this I can warmly recommend, the PHPfileNavigator 2.

You need an Apache Webserver, PHP and MySQL for using it. The interface is very intuitive and good-looking. Makes happy to work with it. Have a look here for screenshots and the download.