TextExporter is a free plug-in for InDesign that export all the stories of an InDesign document into a single file (RTF, InDesign Tagged Text or plain text).
The recent upgrades worked a lot faster than before when used with InDesign/InCopy CS3 and CS4 – but it turns out things were broken in InDesign/InCopy CS and CS2. Also, frame-by-frame export did not account for text in anchored frames.
Version 2.1.1 corrects that. Get it the latest and the greatest here:
https://www.rorohiko.com/textexporter