Where i can find free software concerning Ductwork (sheet metal work)?

I know of two products:


Electronic Service Control (has a free 30 day trial + an online trial) - trialhttp://www.coastalcomputercorporation.co鈥?/a>


Shafer's - http://www.shafers.com/hvac_software/?wt鈥?/a>





Free Software is hard to come by, maybe you could try a P2P Network - http://www.shareaza.com/Where i can find free software concerning Ductwork (sheet metal work)?
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Where i can find free software concerning Ductwork (sheet metal work)?
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Direct Industry (see the link below my friend)


52 products





Computing, Software and Communications CAD/CAPM software for sheet metal, Foundry, Boiler works





TEN POINTS PLEASE