PerfectWorldDF is a graphical world designing tool for Dwarf Fortress. It allows you to modify your world_gen.txt file in a way that gives you a great deal of control of how worlds are generated. Normally, in order to generate an acceptable fantasy world, Dwarf Fortress generates maps randomly and rejects maps that don't fulfill certain criteria specified in the world_gen.txt file. Using PerfectWorldDF, you can directly control much of this process and decide for yourself if this is the world you want to play with. There is an html manual incuded in the file to help get you started.

Note: This application requires the user to replace a WorldGen.xml file to work with the latest version of DF. This file contains info on the latest state of world gen parameters for a given version of DF.

Note: This is a Windows Forms application and as such requires the Microsoft .NET framework version 4.0 to be installed on the machine. Sorry Linux and Mac users! I have no idea if this can be run on those platforms or how to do that.