KeepInventoryX

A Minecraft Spigot plugin that allows you to customize what players keep when they die. The Plugin is configured through the following permissions:

• keepinventoryx.keep - keep all items (does not include xp)
• keepinventoryx.keeprenamed - only keep renamed items
• keepinventoryx.keepxp - keep all experience points (does not include any items)

So, to get the behavior of the built-in /gamerule keepInventory true, you would need the permissions keepinventoryx.keep and keepinventoryx.keepxp.