SCARM - Simple Computer Aided Railway Modeller
Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
RailModeller - RailModeller is a new application for creating model railroad and slot car layouts.
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
WinTrack - Track planing software
RealityCapture - RealityCapture is a software solution which automatically produces high resolution 3D models from photographs or laser-scans.