unoconv
Universal Office Converter - Convert between any document format supported by LibreOffice/OpenOffice.
Website: http://dag.wiee.rs/home-made/unoconv/
Source:
http://dag.wieers.com/home-made/unoconv/unoconv-0.7.tar.gz
Github repo: https://github.com/dagwieers/unoconv
(from redmine: issue id 7106, created on 2017-04-09)