in reply to
docx to txt
There's an app for that.
Err, I mean, there's a perl script for that.
Here it is: http://sourceforge.net/projects/docx2txt/
It's a fairly simple perl script that does just what you need. If you're not on *nix, you'll need to provide an unzip program, by default it just uses /usr/bin/unzip
Works great for me both on Win7 and Ubuntu.
Thanks for the tip on Text::FromAny though, it looks intriguing. If you need a quick-and-dirty solution for all sorts of random formats, it sure is hard to beat. The cpan page is silent about what it uses to decipher docx (or any other format except for PDF), so I'd stick with docx2txt if docx is all that's needed.
Note that docx2txt is not perfect, so if your files contain hyperlinks, tables, headers, footers, footnotes etc., the results may not be exactly what you want - but then docx -> txt will always be lossy by definition.