Bukkit

Simple Sit

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

MobHunting provides a fun way to get money from hunting monsters

The ultimate Parkour plugin

Brew alcoholic potions, get drunk and have fun!

mcMMO

A better way to trade! For Citizens(2).

A party plugin for your server bukkit or spigot.

Unique and challenging custom achievements or quest-like objectives on your server! Books, fancy GUI, rankings, rewards, effects and more!

A visual and dynamic skill tree API for the easy setup of unique class systems

Allows players on a server to travel to places on the back of dragons.

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

Many functions like deactivating pvp, enter a roleplay mode which hides your name tag or respawning the ender dragon.

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

A plugin that adds stores and related commands to Gyul's Economy

Core Plugin of Gyul's Economy

Bring the terror of Disease into your quiet little town

A plug-in that allows server owners/developers to create custom items with their own textures

Adds new Enchantments to your Server.

Simple plugin to let you know the damage you just caused to a mob, and how much health it has left.