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.

The Bukkit World Management Plugin.

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

A plugin to create holograms in Minecraft.

NPCs for Bukkit

The most used authentication plugin for Spigot and CraftBukkit!

Plugin Manager For Bukkit

Set up custom villager shopkeepers

Mine spawners with silk touch

EssentialsX

Chest Commands GUI

The best chest&sign shop system for Bukkit

Colored Tags

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

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

SetSpawn