TRAX - Trax is a free web-based tool for planning your model railroad
SCARM - Simple Computer Aided Railway Modeller
WinTrack - Track planing software
RailModeller - RailModeller is a new application for creating model railroad and slot car layouts.
TensorFlow - TensorFlow is an open-source machine learning framework designed and published by Google. It tracks data flow graphs over time. Nodes in the data flow graphs represent machine learning algorithms. Read more about TensorFlow.
TrainCad - Freeware Microsoft Windows program for designing model railroad layouts using standard tracks.