Bukkit

Allows server admins to create their own inventory menus to perform scripted commands in a similar manner to command blocks

Prevents portal cross-linking by generating them in their exact coords in scale between the nether and overworld

A simple and easy way to integrate language support in your plugin

A coin-based economy plugin with multiple denominations

A simple and easy way to set up rank display names for players on your server

Automatically applies the /r/ultrahardcore Universal Ban-List to your server without interfering with server bans

Allows you to create rollable dice items

A password system as an extra layer of security to protect your players and operators

Lightweight Group-based Permissions Management System

Removes all ores that can only be found by branch-mining while retaining all ores that can be found by caving and exploring

Caps those laggy mob-grinders by limiting the number of mobs that can spawn in a region over time

A plugin developer tool to allow you to create custom popup menu systems for vanilla minecraft players using an API

When hit with snowballs, mobs and players get colder until they freeze in a block of ice

Gouts of flame to amaze and terrify your opponents!