I'm in need of a plugin that check chests across the entire server with a single command to check for illegal items. You would type a command like /check chest and it would search through chest for illegal items. I've seen a few plugins like this, but they are very outdated and do not work with 1.7.
From what I can tell, this plugin still works and if it doesn't I could always download the Source Code and possible update a version fro you. http://dev.bukkit.org/bukkit-plugins/fsa/ It's the same thing as what your wanting, basically being able to frisk players
I could probably add this feature to one of my current plugins. It currently allows you to search a player's inventory for a certain item. It can be found here: http://dev.bukkit.org/bukkit-plugins/AdminToolkit