Belkin expanded its line of WeMo products, solidifying its role in the "Internet of Things" movement. One addition is the door and window sensor that allows you to track whether your home's portals are open or closed. It can pair with the entire WeMo family of products, like the Insight switch, which, if connected to your A/C unit, can shut off your cooling system when windows are open. The sensors will be available in the second half of 2015. No details on pricing yet. Buy it now for $35.