Dependency: You need Essentials plugin.
This is a very small utility plugin to be used when you want to give out items to a player with /give command but don't want items to be stacked in the inventory.
Simply drop AntiStackGiveCommand.jar in the plugins folder and load the plugin or restart the server.
Instead of executing :
Code (Text):/give vk2gpz dspade 10 digspeed:3 name:Dwarf lore:Diggy|Diggy|Hole
use /vkgive command as :
Code (Text):/vkgive vk2gpz dspade 10 digspeed:3 name:Dwarf lore:Diggy|Diggy|Hole
then you will see one diamond spade per slot in player's inventory rather than have one diamond spade with stack of 10.
Whatever could not fit into your inventory will be naturally dropped on the ground.