Spark Plug

SparkPlug is a new plugin in development that has commands that help with administration and also can give you some commands for fun!

CanFly - A command that determines whether your player can fly or not. (Doesn't depend on game mode)
Damage - Damages a player the specified amount.
Heal - Heals the player.
Kit - Gives the player the specified kit.
MaxHealth - Sets the max health for the player.
Nickname - Set's the players name in chat (Display Name) to the specified name
OverPowered - Makes the player 'overpowered' by giving them absorption 255, resistance 255, fire resistance 255, strength 255, night vision 255, regeneration 255, speed 255 (may get changed in the future as it is rather fast), water breathing 255 and jump boost 255 (may also get changed) for the specified amount of time.
Origin - Sends the player to the origin (0,0) at the specified height
Spawn - Sends the player to spawn
Day - Sets the time to day
Night - Sets the time to night
MOTD - Displays the MOTD
PVP - Sets PVP to true or false
Broadcast - Broadcasts a message anonymously to the rest of the server
a - Sets your gamemode to adventure
c - Sets your gamemode to creative
sp - Sets your gamemode to spectator
s - Sets your gamemdoe to survival
Day - Sets the time to day
Night - Sets the time to night
Speed - Gives the player speed
Strength - Gives the player strength
Regen - Gives the player Regeneration
Inspect - Inspects a player
Data - Tells you the data about the item you are holding
Lightning - Shoots lightning at where your crosshair is pointing (up to 200 blocks away)
Beating Stick - Gives you a stick with the specified level of knockback on it

/feed does not work at the minute and I am trying to fix it, which is why it is not included in the documentation.