https://blog.aspose.com/pl/tag/convert-dwg-to-dwf/
Convert DWG to DWF
C# .NET Core, Java, Python, C++, Android, PHP, Node.js APIs to create, process and convert PDF, Word, Excel, PowerPoint, email, image, ZIP, and several other...
dwg to dwfconvert
https://www.myzips.com/software/DWG-to-DWF-Converter-2011.3.phtml
Any DWG to DWF Converter: Batch CAD Tool | MyZips
DWG to DWF Converter allows you to convert DWG to DWF, DXF to DWF without the need of AutoCAD.
dwg to dwfconverterbatchcadtool