InDesign to RTF: TextExporter allows you to export text from an InDesign document into a single RTF file, grouped into a natural reading order.
Even if text frames are not threaded together, the exported RTF file will have all the text in the proper order, which largely removes the need to manually clean it up before handing it over to a Microsoft Word user.
TextExporter 3.3.1 is a free update for existing users.
It has improved support for page ranges: page ranges can either be specified as page indexes (e.g. 1-7) or as page names (e.g. V – IX).
TextExporter is available for InDesign and InCopy CS5 and above (including InDesign CC).
Read all about it at
https://www.rorohiko.com/textexporter