alerts Handles adding of different alerts, mainly dropdown notifications and messages.
dispatcher Event Dispatcher
emailer Handles sending and formatting of individual e-mail messages through the configured SMTP servers on the system
listener Listens for any incoming RPC or one-way direct messages. Used when horizontal scaling is implemented, and this is a back-end application server within the cluster.
sms Class that handles sending of SMS messages via Nexmo.
websocket Handles all web socket functionality, such as dispatching messages to connected browsers.
ws_server Handles the internet web socket server, and listens for messages. For more information, refer to the developer documenation.