I have a website, i would like to have like a light
software ,one way messenger that enable me to send
alert messages to subscribers when they are online.
subscriber will download this software and get an id and password, once online, he will be able to get alerts when i send them with ringing tone to alert him. the alerts will be sent to all subscribers at the same time and not one by one, alerts should be received on real time and software will stay resident in the bottom of the screen once an alert is received it rings and open to show the alert.
i need to have full management over the software like create and delete id and password, give trial period etc.