C@PTCHA
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TeamVK — CAPTCHA (including Image-based CAPTCHA) for anti bot!
Ultra Motd
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TechsCode — The Ultimate Motd Plugin which adds Server and Welcome Motds, Event Triggers, Timers and more
MCJava
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jojodmo — Run Java Code from the Chat • Code plugins completely in-game • Beautiful Syntax Highlighting
Reward
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TeamVK — Give item to a player (even offline player!). Useful for Buycraft, GAListener, etc. to reward player