Free Digital Magazines
Model Railroad Hobbyist Magazine
http://model-railroad-hobbyist.com/
All Scale Rails
http://www.allscalerails.com/
The Modeler’s Journal
https://www.themodelersjournal.com/
The O Scale Resource Magazine
http://oscaleresource.com/WP/
Standard Magazines:
Trains Magazine
https://trn.trains.com/magazine
Railroad Model Craftsman
http://rrmodelcraftsman.com/
Model Railroader
http://mrr.trains.com/magazine
O Scale Trains Magazine
http://oscalemag.com
O Gauge Rail-Roading
http://ogaugerr.com/
Note: this site may be slow to load.
Narrow Gauge & Shortline Gazette
http://www.ngslgazette.com/
Narrow Gauge Downunder
http://www.narrowgaugedownunder.com/
N Scale Railroading
http://www.nscalerailroadn.com/
N Scale Magazine
http://www.nscalemagazine.com
Classic Toy Trains
http://ctt.trains.com/
Rail Serve magazine index
http://www.railserve.com/Railroad_Magazines/