There are tons. Yahoo! Geocities, Freewebs, etc. come to mind.
But keep in mind that if you're going with a freebie, you're going to have stronger space/bandwidth limitations, and you're going to have to display an ad.
Personally, I'd recommend Green Olive Tree Hosting. It isn't a free host, but they do have excellent packages at reasonable prices. That's what we use and are quite satisfied with. The level of customer service is unbelievable!
www.got-hosting.com