Copan for Windows is a functional and easy-to-use tool for computing and managing plane survey coordinates. It does coordinate geometry (COGO) calculations, processes and adjusts raw field survey data, computes and adjusts map traverse data, performs map checks, calculates areas and perimeters, performs coordinate transformations, and imports and exports Ascii files.

Domus.Cad Mac
Domus.Cad is an architectural 3D CAD program. It is a tool for the design and modeling of architecture, interior, landscape, and urban spaces.

BOM4CAD 2004 - Automatic numbering
BOM4CAD 2004 is an AutoCAD 2004, 2005 and 2006 application for automatic numbering in the drawing with number annotations. It can create annotations build with leader entity and unique sequence number either in decimal, alpha or roman number style.

OverCAD Cmp
OverCAD Cmp allows you to finds differences between versions of AutoCAD drawings and displays them graphically.

AutoQ3D Community
Start right away exploring 3D CAD with this Open Source Free 3D Editor released under the GNU GPL License

FlashDWG-DWG to Flash Converter 2005
FlashDWG is a dwg to flash converter, is the best way to share and publish AutoCAD DWG files on the web. FlashDWG is a dwg viewer without need of dwg viewer. demo file: http://www.autodwg.com/dwg-to-flash/flash2.htm