SCARM - Simple Computer Aided Railway Modeller
RailModeller - RailModeller is a new application for creating model railroad and slot car layouts.
AnyRail - AnyRail makes model railroad design so easy, it's fun!
Empire Express - Empire Express: Model Railroad Design for Mac
TRAX - Trax is a free web-based tool for planning your model railroad
WinRail - WinRail is a computer software product for designing and drawing model railway layouts.