Meet Notifon: an awesome gadget that sends you push notifications on your iPhone, Android, or Windows phone from objects you are tracking. You can attach it to your door to get notifications when it opens. The same applies to your mailbox, garage door, and anything else for that matter. In other words, Notifon makes your home smarter without requiring you to make drastic changes.
Notifon can send tweets, push notifications, emails, and even speak to you through Karotz (WiFi interactive smart rabbit). Have an Internet camera? Pair it with Notifon to get pictures with e-mail or tweet notifications. The device is ZigBee powered and easy to use. The battery should last you 2-5 years. You can associate up to 14 Notifon nodes with one Hub. Yet another device that makes your home smarter.