The $200 unit detects up to 10 separate cellphones at up to 33 feet (standard low-power Bluetooth range), and hooks up to the door-opening system to enable you to get hands-free entrance. The site says this is more of an industrial use, and attaches to "gates, overhead doors and parking barriers," so it's less of you getting into your home. Still, it's quite useful. [EMXinc via Wired]

This Swing Door Opener works on left and right swinging doors, and the remote can be assigned to two different openers simultaneously. A timer mode allows the door to be automatically closed after being open a pre-set period of time.

All this automation will run you $324.99, which is worth it if you're in one of those three categories above (young, old, sickly), but not if you're just a fat slob. – Jason Chen

Add Remote Control to your Doors [Gizmos For Geeks via Coolest Gadgets]