Would you like to know how much health or resistance to attacks a mob has?
Damage Indicators Mod 1.7.2 and 1.7.10 is responsible of displaying an interface Minecraft on your screen, with the health or life of any mob or animal that you look at. This user interface shows a thumbnail of the mob you are analyzing and shows you his life bar, also the same data numerically.

Detail and Download here : Damage Indicators Mod

Homepage: Mods for Minecraft