Using external programs for notification.
In addition to Email and Jabber alerts, both M/Monit and Monit can execute a program upon an error event. This is quite flexible and can be used to send notification on different channels using any third-party program.
Of course, integrating Monit with a third-party based on Monit's exec function is just one of many possibilities. You can use this to play a sound whenever Monit raises an alert or if you have a text-to-speech program on your server, have the system read the alert. Or send a SNMP trap.
Here is a small collection demonstrating how to integrate M/Monit and Monit with a few popular online services