GRFMaker is a Windows program that allows creating GRF files for TTDPatch and OpenTTD with a graphical user interface. You will still need to be at home the NFO specification to be able to create GRFs, but GRFMaker removes some of the hairier bits of NFO coding.

GRFMaker was developed by TT-Forums members gl2 and Szappy as a closed source project, but in spring 2006 development seemed to stop. In August 2007, the source code for GRFMaker version 3.03B was released by gl2. The Subversion repository has since been converted to Mercurial and is now kindly hosted by #openttdcoop.

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