Free CAD software
Free cad software is available from all the major CAD vendors. AutoCad, SolidWorks and many others offer fully functional versions of their software for a 30 day trial period. This gives you enough time to learn the basics and get an idea if the software is right for you.Many people find ways to get a free cad program through illegal copies made by freinds, or by purchasing such copies on sites such as ebay and craigslist or file sharing sites. These methods come with risks of their own.