According to the CFMA's 2008 Information Technology Survey for the Construction Industry, 76% of contractors are using CAD software. CAD, or computer-aided design, lets architects and engineers create precise 2D or 3D models. These files replace paper blueprints and make it much easier for key design documents to be shared among members of a construction team. Want to know more about CAD software before you buy? Then read on for product overviews, unbiased end-user reviews from construction professionals and competitive analysis about an array of estimating software tools.