Ever look closely at your energy bill? There's a lot of jargon, some "KWs," and the debt you owe. It doesn't make it easy to know what appliances are the most costly.

The EnergyHub Starter Kit, which comes with a smart plug, smart power strip, and home base, provides a simple way to monitor every cent. The base receives info from plugged-in devices, displays current and projected costs, and suggests ways to reduce spending.

You can also use the hub to set schedules for all connected gadgets so you know what's on and off, and when. Also: Add more items – such as thermostats – and control them all through your smartphone or tablet. [$400; energyhub.com]