Bukkit

WorldEdit is an in-game map editor for both creative and survival

WorldGuard

A new perfect way to clear common lagg in your server!

The Bukkit World Management Plugin.

Grief Prevention

Creates images and pixel-art using in-game blocks

Portals module for Multiverse-Core

The premier long-range map editing tool for Minecraft SMP.

The multiworld plugin made by ferrybig

Create user friendly menus to travel to worlds

CoreProtect

Toggles the physics within a radius of the player.

Players in creative can 1-hit-kill mobs when crouching

Remove lag and improve the performance of your server significantly with this tool!

Nether Portals module for Multiverse-Core

CraftBook adds a number of original gameplay elements to Minecraft from integrated circuits to gates

Inexpensively protects your ores from cheaters.

FastAsyncWorldEdit

Powerful, craftable Wand items and Spell scripting

MineResetLite