Bukkit

A simple plugin to handle permissions, groups, prefixes and suffixes with GUI and Web Interface

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.

A simple plugin to protect villagers and related mobs

A feature-filled Hunger Games/Survival Games plugin

FunnyGuilds is a fully customizable RPG plugin that allows you to create guilds

Skull Turret

Have minecraft read the chat to you

A comprehensive rendition of Nintendo's Splatoon™

Create portals similar to those in Valve's Portal!

Your own Custom Mobs with everything you like

Attempts to do the work of the server admins and moderators automatically allowing them more time to play the game.

A Hunger Games Plugin for your server!

Provides automated plots with protection (MultiWorld support)

Keep yours creatives in the line!

A complete match and event framework for creating arenas and minigames in Minecraft. Supports creating modes through config files, or fully custom modes through plugins.

A Lightweight plugin, that let's the user enable and disable griefing for certain mobs.

Multiple sounds per event | Interval before playing | Per chat-word sounds

MuteManager

Postal

Yet Another Minecraft Image Placing Addon