Bukkit

This is a bukkit plugin that will let you not see players in other worlds using Multiworld. EX. Multiverse

AnitAura(HackBlocker)

The most simple chat control plugin out there! Clear chat, mute chat and with permissions!

Bypasses the Slot Cap On Your Server!

Want a cool way to punish your players!

Jevidia

A developer focused chat plugin.

BanDoggie A Anti-Cheat

Negafinity's technology allows you to easily track the status of your server from the web.

A Plugin with Cool Comments for your Community ...

MAKE MINECRAFT SECURE AGAIN | Anti cheat |

This plugin is best for lobbies!