.dotm
Word template with macros
A Word template that can carry VBA macros along with styles and boilerplate. Word’s own Normal.dotm, the basis of every new blank document, uses this format.
Shared templates and add-ins that bring custom macros to each new document.
Opens in Word for Windows and Mac
About DOTM files.odt
OpenDocument textOpenDocument Text
The word-processing format of the OpenDocument standard and the default in LibreOffice Writer. It stores text, styles, tables and images as XML inside a ZIP.
Documents kept in an open format, which some governments and schools require.
Opens in LibreOffice Writer, Word, Google Docs
About ODT files