Bukkit

GriefBlocker

Ban specific blocks types from being moved by pistons.

Binds players names to specific IPs

A simple pvp whitelist plugin, allows you to choose whith what tools people can pvp

Restrict moderators in your server to prevent abuse! For 1.12.1!!!

StopDrops

Fake logging in or logging out of a server

A powerful permissions system addon for Essentials/PEX/etc

Simpleban is a powerful tool, which is the most advanced ban plugin yet.

Disable connections from unknown proxy ips! (Used for BungeeCord networks)

RBans is a banning system in development.

AntiGrief, AntiSwear, Several unique commands, custom food, gambling

WordUp

put permissions on blocks

Offline-Mode authentication plugin [Free Sourcecode]

Report players to the owner(s)

Stops players from using the elytra or flying machines to rapidly generate new terrain.

The ability to give VIPs or donors the ability to fly but without creative.

AntiBlockBreaker

DoorPassword