Radiomercato.com

The CQ DX Marathon takes into account the sum total of the number of different Entities plus the number of CQ Zones worked during the calendar year. Jim Reisert, AD1C has released version 21.1 of his conversion programme for Windows, which reads an ADIF log file, extracts all of the unique Entities and Zones worked, and writes the corresponding QSO data to the official DX Marathon Scoresheet. The current version was released on 10 February and will expire on 31 January 2022.
See http://software.ad1c.us/marathon/ for detailed instructions.