Ecofan by Caframo, a Canadian heater manufacturer based in Ontario, is made to be used in conjunction with wood-burning stoves. Particularly perfect for winter cabins, it is a clever, energy-free way to help circulate the heat. Essentially, a person need only place it on top of the stove to work. When it starts to heat up, the blades begin to turn, thus distributing the hot air around the room. The hotter the stove, the faster it spins.
Clearly, the Ecofan by Caframo is eco-friendly in that it doesn't use electricity in the slightest. What's more, by properly circulating the heat around the room, less wood is needed to keep the house warm. Doubly responsible, it also looks good as it works.