Did you Google?
Merlin InstantFeedback makes it easy. It sits in your system tray and quietly checks your feedback for you watching, for fellow eBayers to post for you. .
Hi. I've just noticed an icon ( a blue wizard's hat) in the system tray. The speech bubble says it's Merlin but nothing happens when you right click and I haven't been able to find out what it's for. The kids deny knowledge of it.