PistonMOTD

Features

Customize playercounter tooltip
Customize online player and max player counter
Random MOTD
Custom client out of date message. You can force that to always happen too.
Random favicon
Placeholders (extendable via api)
Hide your playercount
Very easy to understand config
Modular (You can enable/disable every feature)
TPS placeholder
RGB support
Luckperms prefix support

Compatible with external MOTD plugins. (Can't promise it will work with every MOTD plugin.)

✨ Are you looking for an advanced administration panel for your server?

EnderDash allows you to manage your existing Minecraft servers using an advanced dashboard by installing a single plugin, batteries included. Run commands (with tab completion), read logs, manage files, invite your whole team, manage players, Ocelot (AI Assistant), works with your existing Infrastructure/Panels and much more.

Check it out: https://enderdash.com

API

It IS possible to create and execute your own parsers with an external plugin. To register you need a class implementing the PlaceholderParser and to register it at the PlaceholderUtil with #registerParser(PlaceholderParser parser).

Here is an example of that: ServerPlaceholder Registering

And this stuff might get handy: Javadoc