Open Rails - Open Rails is an open source simulator that is designed to run Microsoft Train Simulator content.
Trainz Simulator - Trainz Simulator is a commercial train simulator from Australia.
openBVE - openBVE is an open source train simulator
Hmmsim Metro - Line 1, the most complicated subway in Seoul, is now coming in PC version. You can feel high immersion with the graphics that realize the actual Seoul scenery, the train driving sound, and the realistic train driving system.
BVE trainsim - BVE trainsim is a train simulator based on the point of view of the train operator.
TramSim Munich - Discover with TramSim Munich a new city with numerous landmarks as well as the low-floor tram model R2.2.b! Transport your passengers on three detailed tram lines in full length through the centre of the Bavarian capital.