This is a small Java project that I used for my own purposes. With my BoxcarConnectorModel you can easily send notifications to a Boxcar (http://boxcar.io) account - which are then pushed to the Boxcar App.
In short: you can send iOS notifications.
Create a new Boxcar provider. This is free and can be done here: http://boxcar.io/site/providers
Download and import my java class. Then use it as follow:
Create a new instance of the class:
BoxcarConnectorModel m = new BoxcarConnectorModel("your Boxcar Provider API Key here","your Boxcar Provider API Secret here);
Send invitations to your Boxcar Provider as follow:
m.sendInvitation("reciever e-mail");
Send notifications to already subscribed users as follow:
m.sendMessage("reciever e-mail","message","your name");
Send notification to all subscribed users (broadcast) as follow:
m.sendBroadcast("message","your name");
That's it.