Plugins:
CityWorld: http://dev.bukkit.org/bukkit-plugins/cityworld/ (Creates world with cities)
GiantTrees: http://dev.bukkit.org/bukkit-plugins/giant-trees/ (Make giant trees)
Ultimate SkyGrid: http://dev.bukkit.org/bukkit-plugins/ultimate-skygrid/ (creates SkyGrid)
Floating Island World Generation: http://dev.bukkit.org/bukkit-p…-island-world-generation/ (Creates floating islands for your world)
