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.
Home Plan Pro
Many CAD programs are designed for architects and engineers. These can be expensive, as well as hard to learn, and difficult to use. Home Plan Pro is designed to quickly and easily draw good-quality, straightforward designs.
Vectorizer. Transforms raster images into a vector format. Raster drawing can be imported by scanning original paper drawings. The target vector formats are understood by most common CAD programs that use vector graphics (AutoCAD, Corel Draw etc.).
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.
PDF to DXF Converter
It is a powerful windows program that will help you convert your PDF files to usable and editable DXF files quickly and easily, so you can recover the entities in PDF to corresponding DWG entities easily.