BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
SketchUp - 3D for Everyone
iCADMac - User friendly 2D/3D CAD software for MAC OS X, which reads and writes DWG format drawing files.
Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
Sweet Home 3D - Sweet Home 3D is a free interior design application that helps to draw the plan of house, arrange furniture on it and visit the results in 3D.