Interface Question

I am pretty sure this is Part of the standard Blizzard UI.

It's a Boss frame and shows the HP, weird enough though for me It only comes on a few bosses ( I can remember the Council in ToT in LFR)

It could be DBM aswell because I use it too.

@Tonyleila

Isn't it against Blizzard ToS selling an Addon? I think the ToS for Addons say that they always have to be free and there can't be a premium version.