If you got a server and want to let people decide if they want to keep their items and xp after death, than this is the right plugin for you. This Plugin adds one command:

• /keepinventory argument

argument	What the command does
(default) toggle	Toggles KeepInventory
true	Activates KeepInventory
false	Disables KeepInventory
check	Outputs if the player has enabled KeepInventory (OP required)
default set true/false	Set the default KeepInventory mode (OP required)
default get	Get the default KeepInventory mode (OP required)
reload	reload the KeepInventory config (OP required)

Each player can choose for them self. So if you have a server with some players wanting the gamerule keepinventory on and others that want it harder they can each play their way.