One of my favorite gadgets in the last 2 years is easily the Nest thermostat. This device gives you amazing control on heating and cooling your home while trying to keep energy costs down. With it’s ability to sense when you are away and even build a schedule based on your habits, the device has grown as a huge success. Throw in their latest gadget to replace the old smoke detector, the Protect, it is no wonder why Google offered $3.2 Billion for the company.