Nucleus is a big beast. It contains most of the utilities that you could want so you can concentrate on making your server unique! That being said, Nucleus doesn’t have everything in it. In particular:
You will most likely need a permissions plugin, and will probably want an economy plugin.
As a convenience, we suggest some plugins that you could use that, to the best of our knowledge, works with the latest stable Sponge versions. Bear in mind that we do not recommend any plugin, and we are not liable for your use of them. There may be other plugins available.