WorldManager is the most feature-rich and bugfree world management software for Nukkit.
Thats why it has become the standard in nukkit world management.
LobbyNK is the best reviewed plugin on cloudburstmc.org.
Its a fully customizable Lobby System for the Server Software Nukkit.
PluginManager is a plugin to manage all of your plugins.
It can also be used to speed up plugin development..