Door Bell

This simple module allows members to easily get attention of other members. It adds a "Ding Dong!" profile action button (accessible from anywhere where a profile icon/thumbnails appears) and by clicking that button a member can figuratively speaking knock on someone's door. After that one of two possible scenarios will happen:
a) If recipient is offline - he will get an email notification that a sender is trying to get in contact with him.
b) If recipient is online - he will get a site notification: member menu + top-right notification popup regardless of the page he is currently in. On top of that he will hear a sound notification.

This could help members to contact each other more easily. It is possible to edit the strings and convert the module to some kind of "Wink" functionality, that is supposed to allow members to wink each other.
Also this could be useful in cases when an online member had minimized his browser window. In such a case a sound notification will let him know that someone is trying to wake him up.

UPDATE: The module now is integrated with Dolphin's membership levels system. And also it now offers a privacy setting which allows members to control who can use this feature on their profile.