OverCAD Cmp allows you to finds differences between versions of AutoCAD drawings and displays them graphically.01.Find the differences between two DWG.02.Display the differences using contrasting colors.03.Choose your own markup colours.04.Save the differences to separate files.05.Synchronism zoom,location.06.Detail list.07.compare specially entities.08.Save compare result.09.Ignore layers,text height,z-axis,color, linetype.

DWGSee DWG Viewer 2006
A lite and fast dwg viewer with ACDSee-like interface, browse , view and print DWG, DXF files. Supports AutoCAD 2005 drawing format.

BOM4CAD 2007 - Automatic numbering
BOM4CAD 2007 is an AutoCAD 2007, 2008 and 2009 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.

SuperLib
SuperLib is a drawing & block library manager. It assists to build your own custom library to manage related DWG files and blocks. You can preview DWG files and blocks in library, and open or insert them into AutoCAD.

AutoDWG DWG to JPG Converter Pro
AutoDWG DWG2Image a batch converter converts DWG to JPG, DWG to TIFF(TIF), DWG to , GIF, PNG, BMP without need of AutoCAD. Supports command line.

Eye4Software Hydromagic
Hydrographic Survey Software for Windows, Load topographic or nautical maps, create singlebeam soundings, generate DTM's (Digital Terrain Models), generate depth contours, generate cross-sections, volume calculations and more.