From where does one get the Minecraft Crate System, which e.g. SkySlayer uses?

I have my own Skypvp server and we need a crate system because our old one causes buggs that we can't fix and I wanted to ask if anyone knows a good one, for example from the server SkySlayer.de or SkyPotion.de with their heads. This is still one of the best in my opinion and it would interest me.

The plugins from these servers are most likely self-programmed and you will not be able to find them on the internet.

The plugin is not self-programmed because my friend owns such a plugin and I've seen a plugin on a few servers.

I do not know the name.

Okay, could you tell me your friend's name on Skype or how can I contact him?

I'll see if he wants that

Okay, thanks would be nice if you let me know then.