Documents saved in one of the SDW formats (Lotus Word Pro, early OpenOffice etc.) can be typically saved to another document format like formats from Microsoft Word (DOC/DOCX). If you do not have access to Microsoft Office, some of the open source office solutions can be used for this conversion.
Found 2 different conversion types using the same filename extensions.
Conversion sdw to docx type 1:
Convert from Lotus WordPro drawing file to Microsoft Word Open XML document.
Microsoft Windows software - convert sdw to docx on Windows
AbiWord is a free cross-platform word processor that is part of GNOME office suite. AbiWord is unique among word processors in its drive to become a fully cross-platform word processor.
File type (from-> to)
Convert from sdw file
Lotus WordPro drawing file
to docx file
Microsoft Word Open XML document
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sdw to docx. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Conversion sdw to docx type 2:
Convert from OpenOffice.org text document to Microsoft Word Open XML document.
Apple macOS / Mac OS X software - convert sdw to docx on OS X
NeoOffice is an office productivity software for Mac OS X created as an alternative to OpenOffice.org. It has everything needed for common office including word processor, spreadsheet, presentation program, and graphics program.
Multiplatform software - convert sdw to docx on any platform
LibreOffice Write is a complete word processor and document publishing tool that supports a plethora of document formats and has many innovative features. It's an open source software that comes as an integral part of LibreOffice suite.
Apache OpenOffice Writer (OpenOffice.org Writer) is a fully-featured and free word processor and text editor from OpenOffice.org productivity suite.
Apache OpenOffice Writer is simple enough for a quick memo, yet powerful enough to create complete books with contents, diagrams, indexes, etc. You're free to concentrate on your ideas while Writer makes them look great.