Bukkit

Ore announcer, rewards, and anti X-ray

DurabilityNotify reminds the user when their tools have low durability. Great in conjunction with mcMMO!

Message Rainbowizer, Color Parser, and reference.

Sends users a chat notification when they've been targeted by a creeper

A plugin written to make CTM gameplay more of a social experience.

Gives the player a "trip" if they get too many mushrooms

A player movement plugin to allow super high jumps, and super speed.

Lets a player broadcast a command