http://www.spigotmc.org/resources/nicky.590/
http://www.spigotmc.org/resources/motdplusc.1217/
http://www.spigotmc.org/resources/redstone-clock-preventer.1054/

OLD BUT TRY http://dev.bukkit.org/bukkit-plugins/lockette/files/25-lockette-1-7-12/

http://dev.bukkit.org/bukkit-plugins/mcmmo/