pHAlkaline is available to extend PHKAPA according to client needs, and has developed several Notification including Email , Reports , Dashboards , Statistics Plugins/Components but never published in a generic way .. YET !!!
PHKAPA is built on top of PHP and CakePHP framework
For a PHP/CAKEPHP Developer its very easy to implement new features or change logic.
Here's some TIPS:
Notify Component is at app/Controller/Component/NotifyComponent.php
Notifications Model at app/Model/Notification.php
Core Library CakeEmail at
app/Plugin/phkapa/Controller/PhkapaAppController.php as a protected
function _addNotification to see an example ...
Only users related to the process that ticket belongs to are notified.
Let me know if you need some more information ..