The Ring doorbell -- 180 degree picture on Smartphone of who's at the front door (whether home or not); also has a motion detector if someone is in the area of the front door but doesn't ring the bell.
Burglary at Steve Jobs's Home Triggered This 'Self-Monitoring' Startup
Innovation in Motion is raising funds for Slide: Make Your Existing Curtains Smart! on Kickstarter! Works on virtually all your horizontal curtains. Two-minute easy installation. Imagine waking up with natural light, and so much more!