Bukkit

Lockette v1.4 - Simple chest and door lock, no databases!

CombatLog punishes players who log out to escape combat.

Nerf those creepers

Orebfuscator - Anti Xray

An advanced SQL based punishment management system for your server

Guilds, war, land claiming, and user-controlled antigrief

Hide from your players! Invisibility for the distinguished gentleman.

SeePlayerInventory

The free anti-cheat solution since 2016

PlotSquared

Continuation of the popular AntiCheat anti-cheating plugin.

A Lightweight plugin, that let's the user enable and disable griefing for certain mobs.

bPermissions

Backup and restore your server with ease. [aupports FTP]

Password authentication for offline servers (1.14 onwards!)

High performance authorization plugin

The banning plugin that does everything. Properly.

High performance sign-based lock plugin, highly customizable, UUID support.

Residence

Lightweight Protection for Chests, Furnaces, Dispensers, and more