Lots of cheap hosting providers, many of them will get you a free domain when you pay for a year of hosting.

Or, you can use free hosting providers, there are several, google if needed.

As for standalone free domain names, that's tougher, I know only of freenom.com, they have 5 or 6 extensions you can register fro free.

P.S. A lot of providers accept btc nowadays, and so do domain registrars, namecheap.com is probably the most convenient one.