Bukkit

Easy to use, but goes far in complexity for more difficult things to do.

OPJoinOnly

MobControl

A lightweight Discord-logger plugin to keep your server safe and moderated.

Buy and Sell the rights to Lockette containers.

Allows a player to appear sneaking to othe rplayers based on his distance. Good forhiding underground bases.

Simple events logger! Works with Tekkit!

PvProtect - Light Weight World Protection

Control who rides, leads, and access horse inventories, and block horse damage.

IP-based security for Minecraft players

LokiPost

Someone breaking player's house? But you don't know who? Here's the awnser!

Create Unlimited Commands & Block Commands, Anti Tabcomplete, Hide Plugins

Check for people having alternative accounts

WorldGuard EnderPearl Flag

secure your server with a keycard reader of different levels

Beat them up, and jail them!

Adds Shieldgenerators, Airships, Monsterinvasions and lots of other cool stuff to your server!

Block players from doing unwanted things

Settings per chunk about their behavior.