I need a FREE Directory website that allows people to add their website and pick the category they want to be listed in. There will be a category for each of the fifty states and a few other categories which I will need to be able to add or remove as an administrator. They can add their site for free but must put a link to our site on their website (which we will mention before hand and again on the thank you for listing page).
I'm looking for someone who has already done one of these sites. You must have an example or several to show me. All I need is to clone the structure of the site.