Bukkit

Lock your players chests, beacons, furnaces, beds, anvils and other containers even doors with just a sign.

Display Towny towns and nations on Dynmap maps, with live update

Create Tutorials for your Players

A Simple Plugin which adds Commands to a sign.

show listing of the last logged in players

This plugin allows you announce/send Actionbar as message or on join/firstjoin (also ANIMATED ACTIONBAR)

Message when a player joins or leaves a world!

A plugin to show all of Bukkit's color codes.

TheSigns

Logs chat with a time stamp and records it into text files

A date plugin for role-playing servers

Assign texts to commands

Logs votes to a MySQL table

Making administration easier by being able to monitor things on Discord

Anti Macro | Kick Players | Fully Customizable | Freeze

Allows admins to keep notes on players.

This plugin shows the name of the region.

A Dynmap add-on to display TARDIS locations.

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

Improving upon the basics. Colored player list, quickly switch gamemodes.