Bukkit

DrugMe Plugin

AntiSpawnKill

Regionoid: super simple block protection

PwnChat is a Channel-based chat system for Bukkit/Spigot servers that includes cross-server chat through BungeeCord.

Alarm Plugin

Say bye to spamming losers!

Fixes the bug in which the nether's pvp is different then the main world

Randomize your character with blocks & armour colours!

Easy Block Protection!

Ever wanted to deceive disobedient users by tricking them into typing a helpful command?

Provides players with a means of reporting undesired behavior to administrators

Ban all swords but one!

Stop creepers from dropping gunpowder, and players from crafting TNT.

Handy tool for servers

The economicWorldGuard plugin allows players to protect their own land on a Minecraft server by purchasing the land on a chunk by chunk basis using in game currency.

PlayerBan

Indestructible Armor Mod

Retreives the list of globally banned players on /r/ultrahardcore and applies them to your server.

SupportGUI is an easy way to report hacks and bugs directly to staff members using a GUI!

BunjeeLogin is a plug Bukkit communicates with BungeeCord.