A plugin that would control if you could open a door during just the day or just the night. Or you could just keep it normal that it could be opened whenever.
when would this be useful, at mo mobs dont have opposable thumbs so cant open doors. Or you could fit security on the doors with codes like this plugin. http://forums.bukkit.org/threads/mech-codelock-v0-1-lock-your-buttons-with-a-keycode-670.12685/
im actually adding a feature like this to my Turnstile plugin. I'm also adding the option of using doors instead of fence blocks for Turnstiles. I'll post here when its ready.