SCARM - Simple Computer Aided Railway Modeller
Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.
ContextCapture - Acute3D develops breakthrough photogrammetry software solutions to automatically turn photos into photorealistic high resolution 3D models
WinTrack - Track planing software
RealityCapture - RealityCapture is a software solution which automatically produces high resolution 3D models from photographs or laser-scans.