G. Ootilities (Plugin)
Search player inventories for items
Modify the NBT of items anywhere in the inventory/enderchest (or even dropped!), of any online player.
Special scoreboard-related operations (like select the top 3 players)
Features that require a texture pack, like custom blocks.
Modify MMOItems stats of items anywhere in the inventory/ec of any player.
Custom Mechanics, Commands, and placeholders for better MMOItems integration.
Immersive way of calling commands: By building a totem/structure in the world.
In-Game GUI Creator, MythicMobs-powered crafting/upgrading stations, extra enderchests and/or other storage.
Assorted commands: Sudo, Permission, Delay, Teleport, Chance...
Tips and notes on how to use the plugin.
Support for a few other plugins, like vault (charge money to run commands).
As having been the dev of several RPG servers, totaling years of experience, I bring you a selection of tools that will allow you to add extra spicy mechanics.
Though these features' use is not limited to RPG or MMOs.
GooP allows most plugins to communicate with each another, as long as they run commands.
Comment from the Dev:
Its called Gunging's Ootilities (Plugin) because at one point I planned GooM, the (Mod) counterpart.