Fondant Roller: A non-stick rolling pin specifically designed for fondant. Guide rings will often make it easy to roll out to even thicknesses. Though, you don't absolutely need to buy a rolling pin if you already own one; you can use that as long as you're careful about sticking. In addition PVC pipe makes a great (and cheap!) alternative.
Fondant Smoother: Visually, these paddle-like tools make me think of defibrillators; they can be a lifesaver when it comes to smoothing out rough edges--literally. They are used to smooth the fondant once it has been draped over the cake for a professional, finished look free of air bubbles or bumps.