Bukkit

Simple Sit

A complete rpg plugin with custom items that give the wearer powerful abilities and are obtained by defeating custom bosses

Powerful mob and entity management

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

Scavenger

For the people that really hate their friends

Chests with randomly generated money/items (Now with mob support!)

Arena fights for solo players or teams. API for creating simple events

Catch mobs and get Spawn Eggs legitimately!

An amazing plugin that allows you to create your own jobs for your players. The plugin is 100% configurable so you can change everything you see, it is also open-source if you want to take a look on how it's made.

Gather statistics for your server such as playtime, blocks broken and pvp!

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

Brew alcoholic potions, get drunk and have fun!

Backpacks, mobile furnaces, etc... as items! No client-side mods required.

This library is required for all my plugins.

MobArena

Command and config free elevators / lift

A plugin for Bukkit based Minecraft servers to add a new mechanic similar to the bloodmoon event in Terraria

Bring the terror of Disease into your quiet little town

Adds magical runes to the game for Teleportation, Construction, and Combat