Custom items/Loot crates/Command balls

Hey I have a couple of ideas for maybe cool plugins.

if any of these plugins already exist I would like to know.

Custom items.
a plugin that lets you create/config custom items.
lets say it is halloween and you want your players to have a pumpkin head that gives them invisibility.
or you have a stick that if you hold it it will give you night vision.
maybe you want to climb a mountain and need jumpboost boots.
that is what the plugin needs to do.

Loot crates.
with this plugin I am not aiming for a plugin like huskycrates (great plugin btw you should check it out)
im more talking about a chest (doesnt have to be a chest can be any item) you give to your player and once they “use” it they see a spinner that selects their prize then the item disapears.

command balls.
with this plugin i would like to be able to thorw a special item (maybe a snowbal maybe an egg) and once it hits the ground it uses a command.

hope anyone would create these plugins or if they already exist tell me the names.