Bukkit

Make those mobs bleed!

The ultimate questing plugin

High performance sign-based lock plugin, highly customizable, UUID support.

AFK Machine Detection and Destruction

PerWorldPlugins allows plugins to be set to hook onto certain worlds using the config.

Automated Survival Games based off of MCSG with some extra features!

JailWorker

Courier

Edits chat messages to enforce basic grammar.

MCBans A Global Banning Plugin

This plugin allows you announce/send Actionbar as message or on join/firstjoin (also ANIMATED ACTIONBAR)

Makes biomes more realistic.

Charge players money/items to enter an area

controlling vine length and growth in various ways

A pack of custom enchantments for use with EnchantmentAPI

Create turrets that automatically track and shoot enemies and mobs!

BukkitStream (Android Remote Control)

A api for adding custom enchantments

Base Commands for Bukkit Server

ConfigurableMessages