Bukkit

Plugin to (mostly) fix glitchy mobs in SMP

Backfire

Create Cute pet Rocks to follow any player.

A very simple plugin to add recipes that use NBT data

A plugin that saves part of the players inventory on death (depending on a permission).

Apparatchiks users get all the drops and can open SovietChests.

Chance at spawners dropping

A plugin that allows the majority of the players to be sleeping in order for the time to change to day.

Transport-Pipes as plugin (like Buildcraft)

rSoup is a plugin that makes mushroom soup heal 3.5 hearts when right clicked. This is useful for intense/kit PvP.

A plugin to make mining more interesting and fun

Items don't lose durability!

MineIO is a unique plugin that adds electricity-like gameplay to Minecraft, by adding RE or Redstone Energy.

Central Bank plugin

Ever wanted to make hoppers suck in items from a distance, now you can!

Adds a permission for keeping your inventory on death!

War Plugin - Adding guns and grenades!

A complete mob and entity management plugin for your craftbukkit based server.

PartyManager provides a simple party system.

The disco armour plugin!