Banshee is a PHP website framework, which aims at to be secure and easy to use.
Banshee uses the Model-View-Control pattern (XSLT for the views) and is designed to use MySQL as the database.
Banshee is free. If you use (parts of) the Banshee framework to build a website, you must place a link on that website to http://www.hiawatha-webserver.org/banshee. I leave it up to you to place this link on an acceptable location on that website.
You are not allowed to use Banshee to create a website which you sell or rent to other people or organisations.