Most of the free ones nowadays have ads on them. I don't really know of any because I buy my own domains. But, if you sign up on angelfire.com and choose the pop-up ads, there is a code you can place on your page to stop the pop-ups. Plus, most people have pop-up blockers anyway. I'm not sure if they still have this option because it's been a few years since I've signed up there, but you can always try it.