rails_apn_standalone is a standalone Rails 3 based Apple Push Notification Service that can be accessed via a REST API. It uses a fork of the apn_on_rails plugin. I wanted to share the same APN server among a few different applications, so instead of plugging into my application, I decided to write a simple REST layer on top of apn_on_rails. There's also a simple admin UI to manage the data.
git clone this repository
Setup apple_push_notification_development.pem and apple_push_notification_production.pem, instructions are [here] (http://mobiforge.com/developing/story/programming-apple-push-notification-services).
Navigate to server/apps URL and add an application. Specify where your .pem files are on the server.
/devices /notifications /apps