Free DWG Viewer allows you to view AutoCAD drawings with this DWG/DXF/DWF viewer. It is a small application wrapped around an ActiveX component. This allows it to run as a Windows application and in your browser. You can modify and compile the control for inclusion in your own application. Features include a simple user interface, zoom-all/window, pan, rotate, layering, toolbar toggle, and ActiveX interface. It detects and loads Xrefs.