I have created a plugin that lets you get special effects by wearing iron armor. This was originally a privately made plugin, but I have decided to share it with the world! It works on Bukkit 1.8.7, so don't worry about console errors!
Effects:
Upon wearing a full set of iron armor, you will get night vision and haste.
No permissions!
No commands!
No not-fun-ness....!

MinerKit 1.1
Iron Armor = Special Effects!