For those without the luxury of a permanent house sitter, try Spotter. The puck-sized sensor serves as a pair of eyes and ears that track your home environment while you’re away, communicating temperature, light, sound, humidity and motion directly to your smartphone. Spotter can be programmed for simple yet essential tasks, from turning on your lights when there is a knock at the door to alerting you when the laundry load is finished. This handy gadget presents a wealth of possibilities for monitoring your home when you can’t.