One of the butter gadgets that I use the most is my Butter Bell. The Butter Bell crock safely keeps butter at room temperature-- without refrigeration or the threat of spoilage or odors. The Butter Bell keeps butter at the perfect spreading consistency. Flavor and freshness is protected by an airtight seal of water at the base of the crock. I keep one near my stove top (for eggs and grilled cheese) and use a mini version at the dining table.
The Butter Up knife quickly turns cold, hard butter into sumptuous easy to spread ribbons.
One side of the knife has a built in grater to aerate and soften butter making it easy to spread, the other side has a serrated edge for cutting bread. A wider blade helps to collect the grated butter as well as provide more surface area for easy spreading.
Visit their website here