Snowball Damage is an extremely lightweight plugin that allows you to modify the damage that snowballs or eggs deal to any entity.
Features:
Configured Damage Works With Snow Golems
Customizable Snowball Damage
Customizable Egg Damage
Restore Egg & Snowball knockback mechanic
Config:
A default version of config looks like this:
http://pastebin.com/3fYh0gkq Note: Whatever you set the damage to will translate into half of what you put when used in-game. So for example: if you put the damage to 6, it will deal 3 hearts of damage to an entity in-game.