• Utilities are for accessing or modifying data in Civilization IV or for other purposes like creating maps, debugging python code, or editing XML.
  • Notepad++ is an excellent text editor that can make a breeze out of editing any XML, Python, or SDK file. Providing colour-coding for text & tab functionality (a la Mozilla Firefox), a must have for any modder.
  • WinMerge is another fantastic utility, allowing you to instantly complare two files and automatically highlight the differences between them. Love just one aspect of that new mod? Tease it out with WinMerge.


  • XML Marker is a free, user-friendly XML editor. It provides a very effective nesting frame view that allows to see graphically how different XML tags are nested together.
  • Altova XMLSpy 2008 is the free version of the utility used by Firaxis themselves! It has an absolutely marvelous Compare tool that will find for you the differences between two XML files. Invaluable for updating your mod for new patches.


  • The HAP Python Debugger is a python remote debugger which can be used to monitor python scripts running in Civilization IV from the outside. If anyone has instructions on how to use it, please write one into the Tutorials page and link it here, thanks.


  • The Gimp is an open source software package for creating and modifying pixel based graphical content.
  • GIMP DDS plugin is a plugin for GIMP 2.x that allows you to load and save images in DDS format, which Civilization IV uses.
  • Blender is an open source 3D modeler package which in the future might be useful together with Niftools to create and modify 3d-models for Civilization IV. (some reading materials about civ in the niftools forums can be found here and here)


  • BMP to WBS Converter is a utility written by Jon Shafer, Rhye, Jesse Smith, Locutus and Door, that allows you make maps by drawing bitmaps and converting them to worldbuilder saves
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