Apparently many of those respondents are not familiar with or have not had a chance to use Autodesk's DWF format for sharing CAD data. That is surprising, because ...

Users of Autodesk Inc.'s popular DWF 3D file format can now search for and retrieve hundreds of thousands of drawings, maps, 3D models and other CAD documents simply by using familiar search engines ...

It now supports multiple operating systems including the Mac OS and Linux. Toolkit features 3D support, easy access to 2D APIs, and access to DWF-Composer-markup data and object properties from ...