Damage Indicator is a plugin that allows you to harness the new technology of Holograms. (Yes...I know...so many plugins with holograms lately...). Anyway, when an entity is damaged by a player, the entity will get a little "-X" hologram over their head for the set time.
Example
Video
Config
Option
Explanation
Lifetime
How long(in ticks) the displays will be visible
allDamage
Enable/Disable all damage(false = just damage from players)
enabled
Enable/Disable holograms for players, monsters, and animals
hologram
List of lines for hologram. You can use %damage%, %cause%, %health%, and %max%
If there is a bug in the plugin, the chances are, I already know about it. Please make sure you meet the requirements(above). If all else fails, THEN you may post a comment below.
PLEASE include the following in your comment:
Bukkit/Spigot Version(/ver)
UltimateHub Version (/ver DamageIndicator)
ERROR from console. Please use Pastebin to post the error.