Here is a cool switch that lets you turn your home electronics off from anywhere in the world: the Ankuoo NEO Smart Switch lets you control it over WiFi. You can handle multiple Ankuoo Wi-Fi switches with one app. There are free iOS and Android apps for this device. In fact, it works with your existing WiFi network without any issues.
You can set schedules, countdown timers, and anti-theft timers using the free NEO app. The system is modular, so you can add new NEO Smart Switches to your home.