AutoSellAPI
By
TeamVK — This is just empty shells for developers who wish to create a plugin talking to clip's AutoSell.
XGlow
By
Xezard — Simple ProtocolLib based API to create glow on your entities.
Item Bridge
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jojodmo — Use one plugin's items in other plugins | Store and Recall items | Supports CustomItems
SafeNBT
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jojodmo — A simple cross-version API for editing NBT tags, safe for many versions of Minecraft! +Commands