Uniqush is a free and open source software which provides a unified push service for server-side notification to apps on mobile devices. By running uniqush on server side, you can push notification to any supported mobile platform.
- GCM from google for android platform
- APNS from apple for iOS platform
- C2DM from google for android platform (deprecated by google. using GCM instead.)
- This story may help you to understand the basic idea of uniqush.
- Documentation
- Uniqush Blog announces the latest news about uniqush.