Android : Send notification from Android app to any other device

I am developing an Android application that can send notifications (not "push") to any other Android device. Apart from Google Cloud Messaging (GCM) are there any alternatives to do so?

I do not plan to use GCM. My only requirement is to send the notification from my app to any other device via either Bluetooth or WiFi.

I have tried using the basic Notification API for Android but I could not send a notification to other device. It shows me a local notification.