TrainSimItalia
Very new site just opened by a freind of Rotabili Italiani website.
Includes some news in italian regarding TS and TSW. In some way connected to a Facebook group of fan.
UKTrainSim
Maybe the larger site/forum regarding TS. You can find there a lot of usefule hints and info’s.
Rotabili Italiani
Small italian community related to TS2017 and TSW, really active in route, assets and scenarios creation, especially for italian railway.
Rail-sim.de
Wide german site on train simulation, very useful information there, even if only in german language.