MaSzyna is a free, Polish train simulator. The program allows you to put yourself in the role of a train driver and conduct a large number of locomotives/trains, for example EU07, SM42, EP09 or electric multiple unit EN57. MaSzyna executable source code is licensed under open-source license, and comes with huge pack of free assets, on custom license.
Currently latest release is MaSzyna 18.06, for which automatic NSIS installer can be downloaded here.
Currently we don't provide Linux binaries, but it both should run on Wine and you can compile native version from Git code repository.
In case of any problems with simulator, don't hestitate to ask on our forums.
Movie - @ AnteqKolejowy
Music - @ mk1991