Bukkit

NoDeathScreen

Prevents Shift-Click Dupe

Ore alerter

Prevent creative players from creating OP/crash/broken items

Adds the option to let the Ender Dragon drop an custom named elytra and/or dragonhead

MineCarts

Fixes the Piston Quasiconnectivity Bug

Spigot plugin to make flint collection pleasant and/or easy

Efficient AFK detection and management

Reduce CPU usage when no players are online

Prevents item and potion modification

Simple plugin to clear your server's chat.

Reduces performance impact of villagers in 1.14.2/1.14.3.

Trashbin and more

Break and drop your minecart when you get off.

Disables placing a block beneath you while jumping.

OPDS enables a detection if a player is online or offline and triggers a redstone signal.

AntiEnderChest

build portals and travel within worlds easily

A simple Bukkit plugin that controls what happens to your money on death.