Bukkit

Set up redstone wires as high voltage cables to protect areas

A plugin that adds easy and "Light Weight Commands"

A chunk claiming plugin

Revamped Chest Protection showcases a new way to protect contents of chests, letting other users view the contents.

Districts enable players to claim districts and buy, rent or sell them

RyanProof

Keeping your chests, and everything in it completely safe

Kingdoms plugin for bukkit

Easy login plugin for your server. Now with pattern login!

Region Preserve is a very simple, lightweight region protection plugin.

Blocks TNT Ignition and placement for all users, notifies server operators

Change between creative and survival

Very complete lands protection plugin

Prevents obtaining/breaking any item of your choice.

Protect Areas & Object, alert place/destroy block,use command and more other!!

the Bulletin Board Bridge

This plugin adds a second log on to a Minecraft server in order to prevent griefing.

Lag prevention made by The_Gang

A tameable animal management plugin

Use this plugin to ban items and blocks for Bukkit, Tekkit, and FTB servers using the Bukkit API