AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
SCARM - Simple Computer Aided Railway Modeller
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.
AutoCAD Plant 3D - AutoCAD Plant 3D is a BIM software that lets you create, modify, and manage schematic piping and instrumentation diagrams.
WinTrack - Track planing software