I added a page for my Railworks addons. Railworks is a train simulator. For information on the simulator go to the Railworks home page here. 
   





The Railworks folks are adding routes and equipment all the time. And the Railworks community  creates freeware addons, some of which can be found at http://www.trainsim.com/ ,and  http://railworksamerica.com/ 
Some excellent payware and freeware sites are:  http://www.allaboardrails.com/ , http://www.3dtrains.com/ ,  http://www.gtraxsims.com/, http://dickyjim.com/ , http://www.golden-age-rails.com/ .
More North American equipment is coming, including a Challenger from Railworks!
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A good place to find new locomotives is Obo's loco catalog: http://railsim.banal.net/catalog/catalog.html