Bukkit

A plugin that give you more gamemode commands, so you can use /gamemode 0-3 in 1.13.

Place blocks in the top layer of water

Allow undead horses to spawn naturally

ItemModifier

Provides a very useful input/output API for plugin developers

With this plugin, any plugin can use any version of the craftbukkit/nms core in code. Makes all plugins version independent.¹

GriefPrevention addon that provides classification for claims, such as sorting, naming, and a couple other extras

ShowNoPlugins

Reclaim your stairs with the correct tool.

A plugin, that allows you to shutdown the server after a specific time of idle state.

MaximumHealth was Reborn!

Everyone can have CommandBlock

Adds exhaustion to a player every time he catch a fish.

Removes illegal items Illegal Enchants Invalid NBT Unbreakables Illegal items

A spigot plugin for Minecraft servers. Restricts certain block placements and removes illegals from player inventories.

LavaBucket

GoodOpBadOp keeps bad ops at bay by stopping them from doing major commands from Bukkit and other plugins

Simple and easy chunkloaders.

Gets a player's UUID for the new server update!

Adds the vanilla command /effect to Bukkit