Well I assume you are not referring to the tooltip .... so I would hazard a guess that the addon you want is Dr Damage.
The tooltip is from DrDamage.. the unit frame; could be Pitbull or ag_UF. I don't use either but I'm quite sure they can both look like that. The 3D model of yourself could be a plugin for either.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh