RailModeller - RailModeller is a new application for creating model railroad and slot car layouts.
Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
AnyRail - AnyRail makes model railroad design so easy, it's fun!
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.
RealityCapture - RealityCapture is a software solution which automatically produces high resolution 3D models from photographs or laser-scans.