Hello @Anonymous,
There ain't any (free) tools besides Revit to convert a .rvt to .ifc.
If you made the Revit file yourself, what is the reason you don't want to use Revit to export the IFC?
Or if you received the Revit file, what is the reason you don't let the person who made the Revit file convert it for you?
Best regards,
Josha van Reij
Arcadis NV
BIM manager