Cadrail Railroad Layout Design Software
Track layout including buildings and scenery with 3D views. Sample layouts and demo available for download.

WinRail
Layout software with demo and track libraries available for download.

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

Raily for Windows
3D layout software including baseboard. Demo and track modules available for download.

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

Digrail
Control locomotives, signals and turnouts on Marklin digital layouts. Beta version available for download.

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

RailModeller
Shareware trackplanning program for MacOS. Includes editor to customize libraries of track and accessories.

Guardian
Windows based controller for Märklin interface. Demo for download.

Quaker Valley Software
Print car cards and waybills for operations. Demo and upgrades for download.

CATrain
Simulate and control layouts. Controllers for sale, layouts for download and discussion board.

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

Evan Designs
Graphics software to print signs, windows, stained glass and billboard ads.

The Conductor
Supplier of KAM Industries DCC software.

Computer Assisted Layout Operating System
Open source project to develop a program which will assist in operating tasks in your layout.

RocRail
Open Source application for Maerklin Digital for Windows and Linux.