The iRobot Roomba vacuum is equipped with a three-stage cleaning system that features edge sweeping brushes and dual multi-surface brushes with power-lifting suction to efficiently catch small dust particles and larger debris, like food crumbs and pet hair. The Aerovac filter traps dust and allergens, too. Plus, it reaches tight corners and edges, and at only 3.5 inches tall it can clean underneath most furniture—in fact, many shoppers have raved about its ability to clean neglected areas like under their beds and couches. To buy: $180 (was $300); amazon.com.