According to ThirdRails’ website ThirdRails.org is home to the ThirdRails tool chain for Dovetail’s Train Simulation franchise (specifically for TSX).
The ThirdRails Map tool, is a free supporting live map tool for route learning and scenario production. Essentially it follows your train position on a map, where the user can add POI’s (point of interests) about the route, destinations and other information that could be of interest.
ThirdRails Radar (TRR), is a free to use web application which cab used to view your live map, as broadcasted by the ThirdRails, on any device in a web-browser.
ThirdRails Community Radar
This shows all active players, using ThirdRails Radar in a world-wide radar.
Don’t forget to support the guys at ThirdRails on their developments! Like their Facebook page and donate.