Bukkit

Send chat messages from/to MatterBridge

Transfer and sort items from inventories like chests into other inventories

Teleport players between signs without using any command

Throw your XP at yourself (e.g. to repair your mending tools)

Save your XP to a sign

Prevent loosing all your XP after death

Automatically close doors after they have been opened

Respawn players at a random location near the death location

Let mobs talk to players on events like damage or death

Let mobs explode once they die