Bukkit

Allows server admins to easily modify how Minecraft works without programming anything

Library for intercepting sent and receieved Minecraft packets.

Change your ingame skin

A plugin which teleports you to your set home.

Portals module for Multiverse-Core

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

Tablist

The multiworld plugin made by ferrybig

Provides essential server managment tools: World autosave, Backups, Auto restart, Plugin data purging, Plugin management and more.

show the kills an death with the Scoreboard

Fully customize any mobs (and create custom mobs) with a powerful scripting skill system, attributes, equipment, special AI, and much more, along with custom spawners and spawning rules. The ultimate plugin for making RPG servers and minigames.

Detect and fight the exploitation of various flaws/bugs in Minecraft!

mcMMO

Health Bar

A Skyblock Plugin

Open anyone's inventory as a chest in real time!

Add prefixes and suffixes with the 1.5 Scoreboards!

Chat management plugin for nearly every permissions plugin.

Dynamic web-based maps of your Bukkit/Spigot server

Manage Bedwars-Maps automaticly