https://www.eldoradosoft.com/

3rdplanit

Quote from their website:-

3rd PlanIt is the most automated, comprehensive and easy-to-use track planning tool ever made. Better tools let you create better designs! Designing a Railroad?
Thousands of layouts have been designed and built using 3rd PlanIt. From tabletop Z scale, through 4x8’s, room-sized layouts, basement and outbuilding empires and a full-scale ethanol plant, 3rd PlanIt is the CAD software chosen by the most discriminating hobbyists.

https://www.anyrail.com/en

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Quote from their website:

AnyRail™ is probably the easiest-to-use model railway design tool around. It's also entirely independent, so you can build with almost any track. Enjoy designing your layout - AnyRail ensures everything fits. AnyRail enables you to rocket through the planning phase, or tinker to your heart's content - you don't have to be a computer expert to produce successful designs.

http://www.sandiasoftware.com/

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Quote from their website:

This is a powerful CAD program with many different railroad design tools. You can create track plans of any size and shape. There are easy to use drag and drop tools that allow you to snap track sections together end-to-end and align them automatically. Flexible CAD tools let you create complex shapes that your train will run on and that you can build.

https://www.scarm.info/index.php

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Quote from their website:

SCARM means Simple Computer Aided Railway Modeller – software for easy and precise design of model train layouts and railroad track plans. With SCARM you can easily create the layout of your dreams. Just download the setup package, install it and start editing your first track plan. In SCARM you can use unlimited number* of tracks and objects from more than 220 libraries and instantly see your design in 3D preview with a single click.

https://85a.uk/templot/companion/

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Quote from their website:

Templot is a workshop tool for railway modellers who like to build their own track.

If you prefer to buy ready-made model railway track from makers such as Peco, DCC Concepts, Marcway, Atlas, Tillig, etc., then Templot has little to offer you, and you have probably come to the wrong place. There are many other computer programs available for layout design using such ready-made track. See for example: SCARM, XTrackCad (free), AnyRail (inexpensive, recommended), Winrail, 3rd PlanIt (more expensive), and many others. But Templot isn't one of them. You can find them via Google, or ask on web forums.

Winrail

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Quote from their website:

Design Your Layout On A Personal Computer

Hello, and welcome to the WinRail website.

WinRail is a computer software product for designing and drawing model railway layouts.

https://xtrackcad.groups.io/g/main

http://xtrkcad-fork.sourceforge.net/Wikka/HomePage

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Quote from their website:

XTrackCAD is a CAD program for designing model railroad layouts.

Using it, you can

  • Design layouts in any scale and gauge,
  • Use the predefined libraries for many popular brands of turnouts to help you get started easily,
  • Add your own favorite components,
  • Manipulate track much like you would with actual flex-track to modify, extend and join tracks and turnouts,
  • Test your design by running trains, including picking them up and moving them with the mouse.
  • At any point you can print the design in a scale of your choice.

When printed in 1:1 scale the printout can be used as a template for laying the track to build your dream layout.

Learning XTrackCAD is made easy with the extensive on-line help and demonstrations.

XTrackCAD is available for free on Mac, Windows and Linux.