Why do you want a "Free" one. "Free" is not a service, you cannot count on it? A Dedicated IP requires a certain configurations and is a value added service. On top of that, the IPv4 resources are existed, so no one provides them at no cost.
PS: A piece of advise! If you want to improve the overall quality of the ForumWeb discussions, drop the "Free" services talk. It does not create business for anyone. It is a pure loss