From Hot Door:
CADtools adds 34 easy-to-use precision drawing tools to Adobe Illustrator Eight users can maintain graphic and technical control in the same familiar environment. Users can click and drag to size artwork, or draw new shapes, such as walls and arcs. CADtools supports drawing in any scale, additional unit options, and numeric input, so users can quickly and accurately produce presentation-quality layouts. CADtools is designed like other Illustrator tools to minimize learning time. This demo expires in three days; only seven of the thirty-four tools are enabled.