Free Car Drawing Programs

Is there a free CAD program?
I am looking for a free CAD program for designing car concepts that I drew. Is there one? If There is no charge, how much normal for the race?
Not sure if this is the one you are looking for, because it contains a free download. Http: / / www.apperson.org/cadstd/ Here is more. http://www.alibre.com/xpress/software/alibre-design-xpress.asp
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