The Damage Indicators Mod show the health of any mob that is nearby or that you are currently attacking when you mouse over them. You can config to view more detail, even displaying player health.
Navigate to /.mincraft/config/DIAdvancedCompatibility/class.path.to.entity.cfg, open it with whatever editor you use, you will see all of descriptions for every adjustment.
How to install Damage Indicators Mod:
- Download and install Minecraft Forge
- Download the mod
- Go to %appdata%
- Go to .minecraft/mods folder
- Drag and drop the downloaded jar (zip) file into it
- If one does not exist you can create one
- Enjoy the mod