The openBVE Homepage has the release of version 1.2.10 of openBVE, an open source, freeware train simulation. The new version adds support for plugins that can run under Windows Linux, and OS X, and this change log has all the details. Here's word on this hardcore sim: "openBVE includes detailed per-car simulation of the brake systems, friction, air resistance, toppling and more. In 3D cabs, the driving experience is augmented with forces that shake your simulated body upon acceleration and braking, as well as in curves. Besides that, openBVE features a 3D positional sound system best enjoyed with surround speakers, train exteriors and timetables for the current run."