JODConverter, the Java OpenDocument Converter, converts documents between different office formats. It leverages OpenOffice.org, which provides arguably the best import/export filters for OpenDocument and Microsoft Office formats available today.
Docx-converter.com offers a portable solution for your compatibility needs. It will convert a Microsoft Office .docx file into a simple html file. It strips out some of the formatting, but now supports bold, italic, and underlined text. Left, right, cente
Odt2Wiki is an export filter for OpenOffice 2.0 by Bernhard Haumacher. It will let you convert OpenOffice.org Writer files (OpenDocument/Text) to MediaWiki (WikiPedia) text format.
Docvert takes word processor files (typically .doc) and converts them to OpenDocument and clean HTML. The resulting OpenDocument is then optionally converted to HTML or any XML.
"Put all these together, and you've got a command line that converts a Microsoft Office file to an OpenOffice file (or an Acrobat file) with no use of the GUI. To convert a hundred files, you can use a Perl script or other scripting language"