Cadrail Railroad Layout Design Software  
   Track layout including buildings and scenery with 3D views. Sample layouts and demo available for download.
   http://www.sandiasoftware.com/

WinRail  
   Layout software with demo and track libraries available for download.
   http://www.winrail.com

Trackplanning.com  
   Track planning and related CAD software 3D Plan-it. Sample layouts and demo version available for download.
   http://www.trackplanning.com

Raily for Windows  
   3D layout software including baseboard. Demo and track modules available for download.
   http://www.enigon.com/products/raily/english/indexhtml.htm

TrackMyTrains.com  
   Commercial web-based inventory system with custom reports and data downloads. Free demonstrations.
   http://www.TrackMyTrains.com

Digrail  
   Control locomotives, signals and turnouts on Marklin digital layouts. Beta version available for download.
   http://www.digrail.btinternet.co.uk/

RR-Track  
   Graphical track layout for Windows. Demos, sample layouts and free 3D viewer for download. Track libraries for several gauges and system available.
   http://www.rrtrack.com/

RailModeller  
   Shareware trackplanning program for MacOS. Includes editor to customize libraries of track and accessories.
   http://www.railmodeller.de/

Guardian  
   Windows based controller for Märklin interface. Demo for download.
   http://michel.michel.com/Members/Guardian/Guardian.htm

Quaker Valley Software  
   Print car cards and waybills for operations. Demo and upgrades for download.
   http://www.quaker-valley.com/qvsoftw.html

CATrain  
   Simulate and control layouts. Controllers for sale, layouts for download and discussion board.
   http://membres.lycos.fr/catrain/readenglish.html

JMRI: A Java Model Railroad Interface  
   Open source project to help controlling layouts from a computer. Panel creation, decoder programming and Loco-net tools.
   http://jmri.sourceforge.net/

Evan Designs  
   Graphics software to print signs, windows, stained glass and billboard ads.
   http://www.modeltrainsoftware.com

The Conductor  
   Developers of Classic Panel, Loco Ce, Layout Commander and Computer Dispatcher for Lenz, Digitrax, NCE, Easy DCC and other command stations.
   http://www.trainpriority.com

Computer Assisted Layout Operating System  
   Open source project to develop a program which will assist in operating tasks in your layout.
   http://sourceforge.net/projects/calos/

RocRail  
   Open Source application for Maerklin Digital for Windows and Linux.
   http://sourceforge.net/projects/rojav/