Is there a simple plugin just to create a new directory within same account?

Ok so let's say I wanted to create a new directory within the same account, is that possible? Kinda like the MarketPress plugin creates the new directory product/

So someone may have http://me.mydomain.com/product/title-goes-here/

What if I just wanted to create more directories and name them whatever I wanted and then in the dashboard have a separate location to add those posts??? Anything like that exist?