Bukkit

WorldEdit is an in-game map editor for both creative and survival

Vault is a Economy/Permission plugin for hooking into the various Economy and Permission plugins.

PermissionsEx

WorldGuard

A collection of useful commands and features for server admins and players.

A new perfect way to clear common lagg in your server!

The Bukkit World Management Plugin.

A plugin to create holograms in Minecraft.

NPCs for Bukkit

Plugin Manager For Bukkit

The most used authentication plugin for Spigot and CraftBukkit!

Mine spawners with silk touch

Set up custom villager shopkeepers

EssentialsX

Chest Commands GUI

CS-CoreLib

Colored Tags

The best chest&sign shop system for Bukkit

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

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