This simple App allows you waking up Wake on LAN supporting devices using your Apple TV. All you have to do is insert the MAC-Address of the desired device and you're ready to go.
For example: This is the perfect solution if you own a NAS but don't want to leave it running 24/7.
Warning: Please make sure that your device really supports Wake on LAN before installing this App.
Pro Tip: E-Mail the MAC-Address to your iPhone and use the iOS Remote App to copy and paste it.