ODA File Converter
7.1#3 in 3d file converter softwareFree planFree planAndroidLinuxmacOSWindows
VisitIt suits people who need to convert batches of DWG or DXF files between versions, including through a command-line workflow. Non-members are limited to non-commercial use.
Simpel3D suits makers preparing supported 3D files for printing, especially those working with STEP assemblies. The free tier is for personal use; Standard and Pro include commercial use.