1)   Terrain for AutoCAD 1.0 Terrain for AutoCAD is a terrain modeling plug-in for AutoCAD. This plug-in gives AutoCAD the ability to create a terrain mesh from a set of unordered points. 2)   AHatch Pro 1.1 AHatch Pro is a flexible tool for the design of Autodesk AutoCAD hatch patterns. The generated hatch patterns can be used with the AutoCAD "hatch" and "bhatch" commands. AHatch Pro is developed as a stand-alone program. 3)   Free DWG Viewer 5.3.0.2 Free DWG Viewer will open and view AutoCAD DWG, DXF, DWF and secure CSF formats. Drawing files can be viewed easily with full zoom / pan / eyeglass / layering controls. The viewer can save views to JPEG, and it supports accurate snap to point 4)   CAD Closure 1.8 CAD Closure allows you to generate geometric closures from the dimension text (not line properties) in your CAD drawing. Works seamlessly with AutoCAD but is not required as CAD Closure has a built-in viewer. Multiple reports formats available.