Go tournaments are generally run using a McMahon draw. There are several programs which can be used to control such a McMahon tournament. Some of these are listed in the BGA Software Catalogue .
The draw program recommended by the BGA for use in British tournaments is GoDraw V6 , written by Geoff Kaniuk. It runs under Windows.
If you run your tournament using GoDraw, there is a streamlined procedure for submitting your results to this web site and the EGF ratings .