SCARM - Simple Computer Aided Railway Modeller
RailModeller - RailModeller is a new application for creating model railroad and slot car layouts.
WinTrack - Track planing software
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.
AnyRail - AnyRail makes model railroad design so easy, it's fun!
Cadrail - Cadrail Model Railroad Layout Design Software