Bukkit

Add Radiation To Your World

Its Just a Dustbin :P

MOCDreamCrafter

Npc add-on for the Minequest quest plugin.

EndRaid

Pet Creepers

Tiered/custom bows and throwing spears!

SocietyCraft

Village Defender

The Key Stone plugin suite offers a massively customisable collection of modules designed to work together.

Got the munchies? Add all the sweet & spicy foods you love with munchies!

An add-on for the Towny Advanced plugin to allow non-grief PVP

Donor Dreams

More weapons, armor, and tools

Spread potion effects the same way real (not computer :P) viruses spread real disease!

A server-mod modeled after Valve's Half-Life 2 mod, The Hidden:Source!

Wc-Plg

Socialize

MineyGames

An API for CraftBukkit to make machines in the vanilla game.