OneTimeItem
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TeamVK — Use an item ONCE! to execute any commands (as a player, console, op!) World/WorldGuard supported!
Ultra Permissions
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TechsCode — The Ultimate GUI and Command based Permissions Plugin for Spigot & Bungee & supports Custom Models
SpeakHub
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ByCoquito — The best hubcore with cosmetics, Optimized HubCore, Tab and Scoreboard Animated, No Lag
PermissionTimer
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TeamVK — Great for making a EULA compliant server! Grant a permission/rank with time limit!