Bukkit

Offers full rpg system, classes, weapons, spells, mobs and quests

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

Call of Minecraft: Zombies

Brew alcoholic potions, get drunk and have fun!

This is a movement plugin like no other.

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

An mcMMO themed plugin for horse role-playing.

An extensive questing system

Manage ranked group permissions easier

PrisonUtils

Add magic to your server!

Guilds, war, land claiming, and user-controlled antigrief

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

A fully customizable and open-source DayZ/MineZ post-apocalyptic Minecraft plugin.

The most advanced free RPG Skills & Leveling plugin

Makes minecraft more realistic! with a lot of new features.

Simple block/mob/player drop editing - ultimate customization!

Craft magic potions, weed, herbs and mushrooms.

Play as a Werewolf

Automatically sends mined blocks to a player's inveontory