Bukkit

[Spigot, BungeeCord, Velocity] Complex API library to make plugin development easier & faster!

This is libbery for Beast pluigins :)

Set custom join/leave messages for specific users

Core Updates allows the use of a MySQL database to store news updates and display them to in game player.

Assign texts to commands

An easier way to change groups/ranks. [PermissionsEx]

A simple, easy to use chat plugin to help staff monitor there server!

VoteLinksD

Players can get the ChatLog from other players to report them (e.g. in your forums)

PressureWarp - Teleports you to a certain location if you interact with a PressurePlate or a button

Make polls for your server!

MultiKill

Set commands and messages to a block

[EasyBank] Put your Money into a Bank account !

FishChecker

Tag players in chat and on signs! Get their attention with fully customizable sounds and colors.

TeamView

AdminBase is a plugin that can log past names, IPs, bans, mutes, and many other things!

A small plugin that adds tools for servers of all kinds!

Adds motd and any other informative commands(customizable) you'd like