Copan Lite, for Windows desktop/netbook, is a functional and easy-to-use tool for computing and managing plane land 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/exports Ascii files. It's completely free!

PDSYMS DXF Symbols Library
PDSYMS v2.0 is an Architectural/Interiors DXF-FORMAT Symbols Library Add-on for all CADD packages running on all platforms and Operating Systems.

DWF 2 DWG converter
DWF Importer(a.k.a. DWG to DWF Converter) is An AutoCAD Addin let you import dwf file into AutoCAD. It supports AutoCAD 2005, 2004, 2002, 2000(i) and R14.

AutoDWG Attribute Extractor 2005
AutoDWG Attribute Extractor Help you batch extract attribute data from AutoCAD attribute blocks without need of AutoCAD. It supports most DWG formats including AutoCAD Release 9 through to the present AutoCAD 2002.

TRIANGULATION for AutoCAD
An application for AUTOCAD 2002-2010, which makes the triangulation of a set of POINT entities.

ISS Foresight
Experience 3D rapid prototyping as only ISS Foresight can deliver it. Effortlessly add 3D objects and elements, each of your changes and additions created in the 2D Designer are applied instantly in the 3D Navigator. Visit iss3d.com for Tutorials