Hi Aternos Team! I want to suggest a plugin: DiscordSRV
Download link: https://dev.bukkit.org/projects/discordsrv
DiscordSRV is a plugin that you to link it to a Discord chat so people on the server are able to chat with the people on Discord!
A random suggestion I'd like to throw out there (even though you've probably recieved this a lot) is that you should add the ability to upload your own plugins! Plugin developers who are not able to test their plugin on any other servers would benefit most from this addition.
Thanks! 
"Outdated"