Freight Car Builders

What companies still build Freight cars from scratch in North America?

I know of..

American Railcar Industries
Freightcar America
Trinity Railcar

Are there any others? Does anyone have any web links or resources?

Thanks in advance,
Brooks

Try www.dogpile.com and type in "freight car builder, USA". Type in anything you are curious about, and see the answers pop right up...........