Bukkit

The multiworld plugin made by ferrybig

PlotSquared

Creates cleanroom-style flat world generator with fully customizable layers. It can also be used to create empty space maps!

A Skyblock Plugin

Nothing but void!

Exotic Garden

Provides automated plots with protection (MultiWorld support)

A simple void world generator.

uSkyBlock

IslandWorld - Survive on small isle

An Automated Hunger Games plugin!

This is a basic world generator that creates empty worlds. It's lightweight, easy to use, and very basic.

This plugin allow full control of normal world generator

MagicLoot

Create massive trees in Minecraft! Choose your own sizes and block types!

Survival in a sea of acid - like skyblock but with boats!

OrePlus

IslandCraft modifies the terrain generation to create an ocean with many islands; each island is a single biome.

An epic Minecraft Bukkit world generator

A chunk pregeneration plugin for Spigot (and paper) servers.