There was a download of GT command 2.1.3 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software is an intellectual property of Games On Track. The software lies within Games, more precisely Simulation. The most popular versions among the program users are 3.1 and 2.1. We recommend checking the downloaded files with any free antivirus.
From the developer:
GT-Command operates together with Uhlenbrock Intellibox® Märklin Central Station®, Fleischmann Twin Center® , ESU ECoS®, Roco 10785, and Lenz LZV100. GT-Command is command control allowing you to use your voice or write on your PC. GT-Command helps you to command your trains, your points, and all other digitalized accessories. Normally you would use the buttons on your controller, the pen on your flat screen or maybe a remote controller.
You may want to check out more software, such as Command Log Book, Command Flight Planner or GT Manager, which might be similar to GT command.