DoubleCAD XT is a free full featured 2.5D CAD application that has the power to handle all design and detailing needs. It is free to use for personal, educational, or commercial use without restriction or limitation (Yes, you read that right). With its unmatched support for many industry standard design formats including Google SketchUp and AutoCAD, DoubleCAD XT v5.0 assures great interoperability with the applications you use to help optimize project workflow. Based on IMSI/Design's award-winning CAD code with over two million copies sold worldwide, DoubleCAD XT works like AutoCAD LT but goes beyond in a number of important areas, including innovative features like: Self-healing, ACA-compatible walls; Self-aligning blocks; Transparent fills; Draw order by layer; Bezier curves; Flatten 3D to 2D views; Advanced polyline editing; Automatic scaling of units between drawings; Input multiple unit types on-the-fly; Object snap prioritization; Brush editor; Smart dimensions; Split objects, Import xrefs.
DoubleCAD XT is certified for both Windows XP and Vista, but not yet in Windows 7. It downloads as a Zip file, but at nearly 58MB, that's not necessarily a bad thing. It also requires you to enter the provided serial number--not too many hoops to jump through for such fine free tools. Highly recommended. d2c66b5586