Bukkit

An intuitive and powerful plugin to create graphical user interfaces.

The best chest&sign shop system for Bukkit

The premier long-range map editing tool for Minecraft SMP.

Creates images and pixel-art using in-game blocks

A plugin which teleports you to your set home.

A simple homes with the ability to create, delete, and teleport to many different homes.

Create user friendly menus to travel to worlds

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.

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

Easily add commands to NPC's! [1.8-1.12] (BungeeCord Support | Citizens 2)

Slimefun

If you've ever used the VeinMiner mod for minecraft Forge, it has now been recreated for Bukkit, CraftBukkit, and Spigot

The multiworld plugin made by ferrybig

Marriage Master

Addeds the Ability to play music from a custom resourcepack on a server, without overriding existing music

LoginSecurity

Chat management plugin for nearly every permissions plugin.

A quality gun plugin similar to CrackShot.

Claim land of any shape, not just within a chunk

Multiverse Inventories allows you to control who and what can cross world borders!