This is a simple but fun plugin where when you punch (left click) a door, it knocks on it! It uses the sound of a zombie knocking on a door when you punch a door. It plays the sound in a certain radius, which allows others to hear you knocking!
If there is a sign within the specified radius (in the config.yml) with a player's name on it, it will send that person a message and player a sound for them!
The only permission right now is knockknock.knock
It allows players to knock on doors.
See the configuration options here.