The easy-to-set-up, bantam-sized Dropcam is a USB-powered camera with 720p day views and auto night-vision. With the free iPhone or Android app or any Web browser, you can remotely view a live stream of activity in your home. Control camera zooming and talk-back with Dropcam’s two-way audio support via the app. Get email or mobile alerts on your phone when the cam senses movement or sound, be it a baby crying or a potential burglar break-in. Optional DVR service is available for $9.95 per month.