Bukkit

DragonConsole, This plugin allows you to type as you would in a server but in the cmd / console!

Limit Fireworks!

Plugin for displaying command-line arguments for the server

Separates chat by worlds

Admin Essentials

ClearChat is the most downloaded clear chat plugin on spigot! | Global, Personal, Mute |

responds to certain commands

CommandBlock-ICTrigger

Super-Light World Protection: Keep your server protected without compromising performance

Private Warps for players. MySql optional (overkill)

A small plugin to bind other plugins to specific regions

Per-User Chat Filter

A Plugin created for making particular blocks bouncy!

Prevent certain blocks from being broken.

Custom Whitelist messanger

Log almost anything.

Simplifies the /tp command into three smaller commands that easy to use

Adds extra items and mechanics to the Elytra

SDR lets you restrict how close dungeon spawners can be placed.

Allows for users to fire arrows at one another on command.