Bukkit

Plot System!

Minecraft Anti-Cheat

MC-up

VoteBuddy

TestPlugin checks if your plugins have been installed properly with zero faults in it!

ElTools is All-in one useful feature pack.

LocalAdmin

X-Ray Detective

TheFishingGames

Filling Your Server With Kick-Ass Commands

Because normal muting plugins are boring: Troll your server's trolls back!

bukGet Web Interface

EasyModeration

RosterMod

Commands you really should get

DontUseThat

Its Just a Dustbin :P

CopyBooks

Installs & Updates plugins automatically

A centralized ban service for server owners with multiple servers.