Bukkit

Healing (with Heal-Counter)

AlterLinK

Web Based psuedo-whitelisting system

To change Gamemode's all you have to do is type g0(for survival) or g1(for creative)

"Lockdown" your server while doing maintenance, or just de-griefing!

EasySwitch

Makes it both sunny and daytime!

CommandThunder v0.5 - Extend your Minecraft World! [1060]

Game Master

XCon v0.5a

AdminPanel v1.3 - A easy to use Spout panel for admins [1185]

McDefcon - Lockdown your Server

NPCWorkers do your bidding building buildings and doing repetative tasks for you!

[FUN] GetPwnt v0.3 - A whole new way to Get Pwnt [1060]

Automatic chat translation plugin and API for Bukkit-based Minecraft servers.

[ADMN/MECH] TweakedCycle v1.1 - weather- and time-control! (multi-world!, permissions!) [1060]

Minecart Mania extends Minecrafts minecarts, fixing bugs, adding vast customizability, and admin management features.

A plugin that meshes Team Fortress 2 and Minecraft into one experience!

CommandHelper

Scrapbukkit