Spartan - Anti-Dupe & Staff Management v1.1.6

This might not be perfect yet for production servers since it's new, but it is deeply undervalued. At the time of writing, for under 6 bucks, you get a product that is improving massively, but is already too much for its price. Huge recommendation.

Good dupe detector! Just to warn those who own one of BlazeZ's plugins prior to purchasing: The license key injected into the plugin will not work on the first try, you have to make a license ticket, as the actual license is injected into your existing one.
I haven't tested the staff utils, although a /report command would be nice.

Great plugin, the owner is very nice!

fire anti-dupe, clean gui, only issue is custom item/storage menus may not work but thats a small trade off for having a undupeable server