SimLab DWF Exporter is a plugin for SketchUp.
DWF exporter for SketchUp plugin enables SketchUp users to export their 3D models in *.dwf file format. DWF is a secure file format developed by Autodesk for the efficient distribution and communication of rich design data. DWF files are
highly compressed; they are smaller and faster to send than design files, without the overhead associated with complex CAD drawings.
The plugin is supported on SketchUp 2013, 2014, 2015, 2016, 2017, 2018, and SketchUp 8 on Windows.
Users who already have a valid license for the old version of the plugin, can download from here.