This is a discussion topic for the Ore project, RandomMOTDPlugin. View the full project on Ore for downloads and more information.
RandomMOTDPlugin
The plugin displays a random MOTD message that you specify in the server’s .conf file.
To edit it, go to
.config/rmotdplugin/randommotd.conf
In the messages= list, you can write any message you want the plugin to display.