Bukkit

Grief Prevention

An intuitive and powerful plugin to create graphical user interfaces.

Mine spawners with silk touch

A simple and powerful backpack plugin with SQLite and MySQL storage.

The best chest&sign shop system for Bukkit

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

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

Creates images and pixel-art using in-game blocks

Slimefun

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

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

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.

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

Claim land of any shape, not just within a chunk

An mcMMO themed plugin for horse role-playing.

Disguise as a mob or other player

**Not Maintained** Display an RPG-style health bar above mobs and players.

Keep your inventory in a chest when you die !

Mine spawners with silk touch

a feature-rich world size limiting plugin, which can also generate or trim a world to your border