So not sure if you have found it yet, but we have a plugin posting system: https://ore.spongepowered.org/
You might want to search through there if you haven’t yet.
There are a lot of plugins that still haven’t migrated over there (due to regulation issues, or ore features missing).
Nucleus is one of the more well known (and afaik used), essentials like plugin.
I’m also a little biased, so would recommend FoxGuard to you as a world protection plugin if your looking for something like that. We also at some point in the (hopefully) near future, will be having FoxEdit come out, which will me a much more advanced world editing plugin. Both systems have a custom CUI system (not required).