Export to DWF format (Autodesk web format) is typically doable with Autodesk software only, but some alternative products sometimes have plugins that enable export of designs of models as .dwf as well.
As for export of .kmz files, this is typically doable for as export of 3D terrain topography or similar content, so tools focused on architecture are most likely your best choice for kmz to dwf conversion.
Updated: September 13, 2023