Bukkit

WeedPlugin

Safe Command Block makes the management of command blocks easier and safer.

Unusual hats in Minecraft!

Skydive

SuperBroadcast is simple and easy configurable plugin for your server!

A Plugin to Change the Join, Leave, Kick and Death Messages on your Server

Cobblestone generators have a chance to spawn ores!

Multifunctional plugin for your hub server.

Grapple

NoAccountHack

An API for writing plugins in Scala.

Complete mmo immersion in Minecraft!

Create secret doors to hide your stash!

PotionPusher lets you take any potion and change it's effects.

Heal your friends by hitting them with food!

Automate Everything - Heavily Inspired by Factorio

A simple jail plugin.

AntiPluginSteal

Mastermind/Codebreaker for Minecraft

DotLegit