Bukkit

All Aggressive Mobs are OP like Zombie wears Diamond Armor etc

The Spigot Plugin that makes minecraft IMPOSSIBLE

A World Generation Libary and Example

A plugin to freeze players in a spot so you can have the time to think of further action.

Is a Plugin helps you to play in Mord than one world

Simple world generator

A plugin that lets entities and players ride vehicles through portals

Skygrid map generator

AddQuartz will add quartz to chunks in the nether

Disables water and lava spreading to make building flying sources easier

hubhub

A block is created by typing the command /p op, gs, lb, b in the air.

Generate custom made terrain

Resets The End either manually or periodically

This plugin adds palm trees to your server's beaches and deserts.

GeneratorStone

Generates a paradise-like world.

FullBirghtReplace This is a redesigned plug-in for mobs with armor and weapons.

FlatSurvival

DarkBorder