The Big No!
This plugin contains all the simple anti-greifing tools, ever wanted to disable explosions and portals?
Or maybe just wanted to stop players from placing blocks without having a certain permission node?
This plugin has this and much much more! The plugin is yet not made, but it'll be done before you even know.
Just drag and drop the jar file in your plugins folder, and reload your server, then take a look in the config.yml file.
https://github.com/Venican/TheBigNo this will be updated regullary with updates, maybe some alpha builds.
Just a reminder, it's still a work in progress. And it'll be released before you even know.