Site44 is a free web app that hooks up with your Dropbox account and lets you create multiple websites inside your Dropbox account for the world to see. Create the page with their site builder, and then manage and edit the site locally -- your changes will always sync to the web.
The video above does a great job of walking you through how Site44 works, but the process is simple. Connect the app to your Dropbox account, pick a .site44.com domain for your site (or use a custom domain you already own), and the service will drop a folder in your Dropbox folder that represents that site. From there, you can edit and manage the site on your own computer, including uploading images, creating a directory structure, adding CSS for your page to use and more.
Site44 pages are designed for static content though, so it's ideal for building a nameplate site for others to see, an online resume like the one we just showed you how to make, or a personal start page with your favourite links and webapps on it, not necessarily a blog or interactive site. You can read more about Site44's basic features and advanced features here.
Free users can create up to five, low-traffic pages, but you can always step up to a $US5 per month plan for 10 pages and 10GB per month of data transfer, or $US10 per month for 50 pages and 50GB per month of data transfer. Using the service is no replacement for a full web host, but if you don't need all of those features and use Dropbox anyway, this is a solid alternative, especially for free users.