Bukkit

Since minecraft 1.4, mobs have had a chance to spawn with armor.  This plugin allows you to spawn mobs with ANY armor, ANY item in their hand, ANYTIME!

Features:
    - 4 armored mob types: zombie, skeleton, wither skeleton, and zombie pigman.
    - 4 passive mobs: sheep, pig, dog, cat
    - Easy to use: wear the armor you want and do a command!
    - Baby mobs! (Zombie, Zombie Pigman, Sheep, Pig, Cat, Dog)
    - Works with dyed and enchanted items!
    - Mobs can be spawned using command blocks and the console!
    - Customizable armor drop chance!
    - You can make armored mobs spawn naturally too!

In-game use:
    - Wear the desired armor (the armor you want the mob to have).
    - Hold the desired item in your hand.
    - Do /armormob <mob>!
    * Optional: To make a baby mob, do /armormob <mob> baby
    * Permission: mobarmor.mob

Console and Command Block use:
    - The command: /armormob <mob> <item> <armor> <world> <x> <y> <z>
    - <item> is the item the mob will be holding
    - valid <armor> types: leather, chainmail, gold, iron, diamond
    - <world> means the name of your world.
    - <x> <y> <z> specify the location where the mob will be spawned.
    * You can spawn baby mobs here too, just add 'baby' to the end.
    * Using this, you can create invisible overpowered mob spawners!

Passive Mobs:
    - Only works as player: /passivemob <mob> [data] [baby]
    - Works anywhere: /passivemob <mob> <world> <x> <y> <z> [data] [baby]
    - When spawning sheep, [data] means the wool color
    - When spawning pigs, type 'saddle' for [data] to spawn a saddle pig
    - Adding 'baby' makes the mob a baby.
    * Same permission: mobarmor.mob
    * You CAN make baby pigs with saddles and ride them!

Natural Spawning:
    - Go to the config.yml, which is generated the first time you run your server with MobArmor
    - Set "enable" to true to enable natural armored mob spawning
    - From there, you can customize the items and spawning chance per mob
    - Here's a tutorial on how to do it: http://dev.bukkit.org/server-mods/mob-armor/pages/config-tutorial/

Custom Drop Chance:
    - Look at the block the target mob is standing on
    - Do /dropchance <item> <helmet> <chestplate> <leggings> <boots>
    - <item> is the chance of the mob dropping the item in its hand, <helmet> is the chance of dropping the helmet, etc.
    * You should see a message saying "You have set the drop chance for [mob]"

Hope you enjoy!