The Building Game plugin http://dev.bukkit.org/bukkit-plugins/buildinggame or https://www.spigotmc.org/resources/building-game.10547/.

Navigating the files: The main plugin is in the buildinggame folder. The addon in the addon folder. The bungeecord version in the bungeecord folder.

If you want a less serious environment to just chat in (about this project or other stuff) you can join our discord.