Bukkit

FlyMode - 1.13 Command support, ActionBar support, Customizable messages and Leave safety system

Add redeemable codes that give you items or money!

AFKCoords

Manage your chat

Chat Channel Pro

MOTD is a lightweight motd, time vote and teleport plugin.

Complete Administrative Control - Use, manage, and view authoritative actions on your server like never before.

Yells titles and subtitles

Better messages for your server, join/leave messages, world change messages and more!

ServerInfo

A brotastic nickname manager

SimpleMessaging is exactly what it sounds like. It simplifies messaging.

A plugin that comes with many features.

Make polls for your server!

Allows players to change their name color in the chat

PrefixSuffixManager

BSwear (Better Antiswear) is a very powerful antiswear plugin (with lots of words preblocked in the config)

Adds commands to your server

LiteChat is a simple to use chat plugin.

A simple plugin that allows you to create quick customized join / leave messages.