Bukkit

FireworksEx can cause a great welcoming for players that join and will allow you to create different fireworks using commands.

get cash for pvping!

Break a ore and a stone block is replaced by it.

Overrides the /say command to be more compatible with VanishNoPacket.

AdminHelperCommands

Velocity plugin to provide chat broadcast between Minecraft servers or even discord server

Gateway Pluggin to optimize Bandwidth

Simple Prison Mines for you Prison Server!

An easy way to create signs for your server.

Bssentials GroupManager

Easy Time-Changer

Allows lua scripts to use the Bukkit API.

Jarvis is your personal server butler.

Craftable Bow Quivers

Tells you a players username

Spawn your own head or the head of anyone else.

Craftable Ice!

A plugin allows you to give items / commands to all the players which supports generating random number.

HulkSmash

Allows you to setup per-region texturepacks on your server.