Optionally available for WPTools 7
is native support for DocX files. You will need Delphi 7 or later since UTF8 support is required. Unless you use Delphi XE2 or later, you also need "abbrevia" for ZIP file support - you can download this component at http://tpabbrevia.sourceforge.net/
Pretty much all WPTools features are supported in DocX format. Only proprietary WPTools objects, special user properties and sub paragraphs cannot be saved in this format.
If you have licenses WPTools "Premium" also textboxes, footnotes and columns can be saved and loaded. Columns will create a new section block in the DocX file.