The average compost bin is little more than a box that attracts rodents and emits the smell of rotting plants. The 55-gallon, two-chamber Algreen Terra Dual-Batch Tumbling Composter solves both problems by utilizing a drum that's lifted off the ground and sealed with a sturdy sliding door. Because it rotates, you can mix up compost by simply turning a handle, rather than poking around in the pile with a pitchfork. [$190;]