I've seen this mod in a couple of user compilations and was wondering not only it's name but what it does/is doing.
This example is from Seerah's Suitcase:
http://www.wowinterface.com/downloads/full11010.jpg
The numbers (some in the 2ks) are shown at the bottom on the action bar icons. Is that how many times you could cast that or it's strength? I've only seen it in casters, so I was just wondering!
Thanks!