This is a data broker addon to allow capturing of all whispers. The name of the last whisper target is displayed on the broker. The last 15 messages (configurable up to 50) will be displayed in a dropdown list, with timestamps.
Right clicking will allow you to see conversations from players other than the last target, this number is also configurable. Shift left clicking will delete the current whisper thread. The color of the incoming and outgoing text displayed can also be modified.