Übliche

This Velocity plugin adds a '/hub' command for quick teleportation to the hub server. It supports customizable messages, configurable hub servers, custom aliases and smart load balancing.

Docker-backed Velocity server auto-registration plugin.

The 4KB Spawn Plugin

The MIDIReceiver plugin plays Minecraft note block sounds based on real-time MIDI data sent from the client

A lightweight Minecraft mod for sending MIDI-like actions from the client to the server via custom plugin messages.

The Fabric Mod will Convert your Worlds into Polar