Bukkit

Quickly and easily manage rank tags and player prefixes without the hassle

Medic allows you to manage any player's health, max health, hunger, and saturation levels with commands.

A simple but feature-full nicknames plugin that allows you to set other players' nick names

Spectate players in first-person while having their inventory, and more stats to match their view

Get money on mob kill!

Gives you a UUID from a player's name

Allows you to toggle fly for yourself or another player.