Pops up a reminder when you go AFK. The message frame has a button which will remove AFK status if clicked. If you wish to continue playing while having the AFK status, then you can close the frame with the button in the top-right corner. A timer will also appear that will show you how long you have been AFK.
The 'art' for these frames is from the AddOn AI-Art.
- wowuidev and leethal