I've just uploaded 'Notify' to OS4Depot. This simple little program is designed to act as a kind of 'middle man' between AllKeys and the AmigaOS notification system (Ringhio). Notify makes it easy to associate a key presses (and a few other events) with on screen notifications.
I made this a few weeks back as I wanted a way of having notifications show when pressing some of the 'multimedia' keys on my Perixx keyboard, such as the volume controls.