Sheet metal for AutoCAD. It calculates flat (unfolded) sheet development of ducts, rectangle to ound transitions, cylinders, cones, intersections, connections, bifurcations, elbows, etc. For HVAC, hoppers, cyclones, ducts, silos, piping, etc.
Copan Lite enables you to calculate coordinate geometry (COGO), process field surveys, adjust map traverses, perform map/deed closure checks, calculate areas and perimeters, transform coordinates, and import/export Ascii files. It's free.
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.
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
EDraw Flowchart ActiveX Control - Build flowchart applications with minimum time loss! Lets you quickly build basic flowcharts, organizational charts, business charts, hr diagram, work flowchart, programming flowchart and network design diagrams.
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.
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.