Bukkit

Distant Farm

Add the ability to hug other players on your server with HugMe!

/effectgui Show effect list GUI

Potioncmd

A SCUBA Diving Plugin

Join servers you usually can't.

TrollThePlayers

Spawn lightning when you shoot an arrow

The Bukkit Networking API

Just a heal-plugin with more features ;)

A fun little plugin that kills you when unlocking a new advancement

Creates regenerating mining spots!

A robust antiswear plugin with a unique algorithm

Allows Glass Block and Pane Drops

Lockette-RustedLocks

A plugin to temporarily disable chat for all non-admin players

BasicCommands

Survival PvP

Team PVP oriented plugin with ZERO commands!

It adds a gui to item frames so that you don't have to break them every time you want to replace a block