Bukkit

ServerStarter

BetterFishing

Vote on multiple things and execute command(s) based on result.

VaultCmd

CheaperCraft

Permissions plugin for AdminCmd

A plugin that removes abusive/destructive blocks.

RCNexus Heal

noTNT reloaded

Lightning Wand

A BanSystem that allows the server admin to easily punish players

InformaBan aims to provide a kick/ban system that sensibly tracks and displays a player's kick and ban history.

SpeedGUI

Players must have chatmode.activated in order to talk in chat.

GameChanger +

VoidTeleport

A basic hardcore system.

Silk Touch Spawners

A plugin that allows the setting, getting and warping to the spawn of a world.

A plugin that play one sound when you speak on the server chat