DropPages is a service that allows you to easily set up a basic website for free using your Dropbox account.
DropPages is easy to use and set up. Simply create a site folder inside Dropbox that matches the domain name. The domain name format will be yoursite.droppages.com. For custom domains, you'll have to upgrade your account for a fee. Then you share the folder and get started. There are themes and it automatically generates navigational elements so all the pages are linked.
You are subject to data transfer limits in Dropbox (10GB per day for free users) and if you go over this limit your account will be suspended. This means DropPages is really only useful for a small simple site.
If you are looking to create a simple, small website, DropPages may be an option for you.
Related:
Google Sites - free website hosting. Has class web site templates and integrates with all of Google's apps.