I want to know with which software I can convert the NWD format to a format of STL or other cad formats?
The first link says FREE TRIAL which will give you a fully functional 30day trial of the NavisWorks package, not just the viewer, that should i would assume give you the tools you need.
Forums most often have people trading blind and incorrect data. As the primary data translation expert I spend most of my life trying to stamp out these common misconceptions on forums.
As some general notes for this question:
1) If you have a NWD file then that statistically means your MCAD data came from a much better program to start with. Navisworks is never a "source" of MCAD data but generally used as an intermediate viewer, so to speak. In all cases I would always have my customers try to find out where that data originally came from and obtain those files. More times than not, the data would come from Intergraph PDS, Microstation DGN files or AVEVA PDMS.
2) Navisworks is more of a mesh based program (polygon based) and not NURBS/solids based. This is why you don't see MCAD/CAD export file formats. Navisworks is not generally used as a file conversion system as my own Okino software would be used, in various situations (it all depends on where you want to send the data). As the #1 question I get 3+ times every day for 18 years, you can't "convert" from a mesh-based program into NUBRS geometry for STEP and IGES output. You can, however, convert to STL as it is *not* a CAD file format as almost everyone believes.
3) If you care to review this pending forum posting again, the most important information is missing from your initial posting: into which program do you wish to convert the NWD files? In the world of professional conversions it is all about the names of the original source data and the name of the destination program which is most important and not the name of the file format you have at hand for the source data.
This software (Navisworks Freedom) is just a viewer. you can not use it to export the geometry or at least I don't know how can I do this. I try it already.
would you please tell me how can I export the .NWD geometry with this software?
I try that (Navisworks Manage 2013) also, but there is no any possibility to export in any CAD formats.
It is possible to export in google earth KML, FBX and DWF.
http://forums.autodesk.com/t5/Autodesk-Navisworks/RE-exporting-part-of-nwd-file-to-other-file/td-p/3156718 suggests that FBX is your only real option for exporting. Converting is probably out of the question as in that post it also suggests that NWD is like an assembly manager bringing CAD formats and giving them a united environment regardless of the creating format
FBX will get you into rendering software such as 3ds max, keyshot and others, they might be able to export it, but it's certainly a convaluted way of doing things ... I will look into this some more as you have tweaked my curiosity